I've been buying it, but I haven't read any of it yet. I was sort of planning to wait until it was finally finished and then I plan to read the whole thing in its entirety. What I will say though is that, like you, I don't think the series was ever as good after Moore stopped writing it and Gaiman took over. It wouldn't surprise me overly if that was the case with the Silver Age. I guess I'm expecting the Silver Age to be decent, but not up to the standards of Alan Moore's run on the character.

Based on Zenith, I kind of expect it would play out with a lot of cross-dimensional stuff, like the other bodies in hyperspace somehow coming into play, including some nasties from the Qys.  I always thought Zenith peaked with the Richard Branson stand-in and went downhill with the following storyline.

I like some Morrison and not others; but, have always found him to be Alan Moore-Lite, meaning in a similar vein, but with less originality and demonstrated talent.  not to say he isn't talented or a good storyteller, just not at the same level I perceive Alan Moore.  I like Roy Thomas' writing, but he isn't remotely close to Moore, as a writer of depth.

Morrison, like all writers, has his tics and some would work well with Miracleman and others not so much.  He has a definite trend of wanting to pull things from other worlds/dimensions into stories, as sources of power or conflict, often in Lovecraftian ways.  A lot of his stuff, to me, reads like a list of influences, especially Michael Moorcock.  To be fair to him, there are times when I feel that with Moore, especially when dealing with dimensional alternative figures.  They both read, to me, like Moorcock's Eternal Champion, especially in stories like Sailor on The Seas of Fate, where Elric meets other manifestations of the Eternal Champion (this occurs in other stories, too).  Morrison is heavily influenced by (and Moorcock claimed stole from) Jerry Cornelius.

Given similar writing and thematic influences, I do think they would mesh better and when I am in a less kind mood, I would say Morrison would largely ape Moore, as he did in previous work.  Gaiman has similarities; but, he comes across, to me, as a somewhat different literary tradition, more based in fantasy and horror than the mixture os sci-fi, fantasy, horror, ind English literature that Moore is, and a lesser extent Morrison.  Sandman has a lot of influence from writers like Lord Dunsany and Gaiman has followed Moorcock and even wrote a short story to Moorcock's writing, but with the thesis that he outgrew it for others.  Also, Moore and Morrison have seemingly been more involved with psychotropic drugs, though I really don't know Gaiman's history, as I haven't seen  or read much discussion from him, on that subject.  I suspect pot and alcohol, at least, but have no idea if he ever dropped acid or consumed psychedelic mushrooms or imbibed in cocaine, in the 80s, when it was prevalent.  Gaiman came from music journalism, so he was at least around it.

So, yeah, Morrison was probably a better fit; but that was unlikely to occur.  Gaiman has moments and I enjoyed a couple of issues of The Golden Age a great deal.  Specifically, issue 19, with Dr Gargunza's consciousness replicated in an android form, in a special garden, alongside multiple versions of Andy Warhol, who then tries to break programming and the confines of the garden to go into the outside world.  It made me think that Gargunza will eventually succeed and be a factor in the next battle.  The Warhol stuff was interesting, as it played on the convention of Warhol's prints of repeated images, with minor alterations.  He is seen wearing a t-shirt, with the "KIMOTA!" lightning bolt logo.  The other is issue 21, with a village for former spies, where they can play their games of intrigue and deception.  It has the feel of The Prisoner, with a slightly different take on the themes of it.

Beyond that, the only part that really interested me was the single page bits at the end, of MM launching a probe into hyperspace, which locates the merged bodies of Dickie Dauntless and Young Miracleman and takes a DNA sample, which is then returned and Young Miracleman is cloned and reborn, for the start of The Silver Age.  With the Silver Age, the first issue is intriguing, as Young Miracleman reacts to this new world and not necessarily in a positive way.  he is extremely confused and frightened, as well as sad and conflicted about Miracle Woman.    The next issue picks up on that and continues, then has YM flee Mt Olympus.  Then, everything stopped for 30 years, with a tease of a page of art, from the next issue.  Once Gaiman and Buckingham returned, I found that next issue a very mixed bag and wondered if it was the passage of time or if the story was unaltered from its conception, 30 years ago.  After that, YM continues exploring this world and I felt like we were spinning our wheels again, as we had in The Golden Age, for most of it.  Moore' stories explored all kinds of things; but, there was a definite journey from Point A to Point B, building to a climax.  With Gaiman, it felt more like a meandering around trails that cross back and forth over one another and bring you back to the start.  The lack of further detail about the Bates cult seemed like a major omission and the ending in the recent issue seems like it was erased and reconstructed, in a new form, which doesn't quite gel with previous chapters in the Golden Age and the earliest published chapters in The Silver Age.

It makes me wonder how much of what was published in the more recent chapters was there in the early 90s and how much was altered by the passage of time and change in interest in Gaiman?

Ultimately, the passage of time affects the work, for me, because I have 30 years of imagining how the story would play out and it is hard to compete with the mind for that kind of thing.