That was an amazing synopsis. Even leaving out the Myxy stuff, it cut to the core of Morrison's ideal - Superman being timeless and part of everyone.
I think he mostly experimented with drugs around the time of doom patrol and the invisibles. He kind of rebuilt himself after that and as far as I know he's been clean for ages and ages now.
It bothers me when people write off Morrison's action comic run as nonsense and then admit they bailed around issue 5 or 6. Is the run confusing? Yeah without a doubt. Is it far more confusing than it needs to be? Of course. But Morrison had a clear story he was telling for the majority of the time and it's wrong to wave it off as a bunch of nonsensical ravings of a drug user when that's not the case at all.
It's absolutely not for everyone and apart from issues 1-4,7 and 8 it is in no way a good comic for people new to superman or even to Morrison's writing. But it's a great story with some fantastically imaginative moments and ideas.
If I were to explain it, if would simply go like this:
Lots and lots of weird and silly things happened that probably won't be mentioned again as Superman grew from his blue jeans phase to a hero in a very all over the place type of run.
That's kind of how I view the entire run. Morrison's stuff was really out there this time around and in then end, I'm just left shrugging and caring so little about anything that happened.
I believe there should be a balance, both in the industry in general and even in some specific mainstream titles. I think Morrison's AC run was somewhat "simple" enough initially, then got fairly "uhh...?" after the first year or so. But I definitely don't think it was as complex as some of his previous works. But aye, I enjoy both complex (Prophet, Ales Kot stuff kinda, Morrison, etc) and simple (typical superhero stuff) equally the same.
Comics were happier before the Internet turned writing superhero stories into fruitless attempts to impress/entertain a small group of ppl who appear to hate comics and their creators.