I found it very telling when Marvel blamed the downturn in their sales on DC's temporary returnability policy for Rebirth. Essentially they were calling out DC for being better at the game than they've been.  And God forbid Marvel ever make any of their books returnable because they may desperately want to tie up retailer capital but they never want to risk having to give any of it back.

1) Co-ordination seems poor - comics contradict each other, events don't match up, even mini-series launched specific to an event do not match up - anyone remember the Spider-Man mini that went with House of M? Bore no relation to what was in the main comic at all
Editors say it is difficult to keep track of things and things 'slip through' That was not a case of slipping through, it was a major screw up. Hint, if you are making it so big you can't keep track of it, it's too big, and too complicated - scale it back

2) launching new mini-series to compliment the main event

One event comic and all the cross overs are enough. To have an event cross over in to Spider-man and then launch another Spider-man mini attached to the event is just rediculous

3) Multiple events happening at the same time

This is just crazy. There are events happening, events starting to happen and events still picking up the pieces all at the same time. Do comics even get a chance to breath and tell their own story nowadays? Spider-man may well be focused on the clone conspiracy, or whatever his event is at the moment, but that means all the other Spider-man titles are also focused on that

4) Cross-over comics that aren't

Hey kids, buy this comic, it's part of the new mega-event. Yeah, for one panel.

I know I should be pleased with that, as it means the comic can do its own thing, but it pretends it's part of the thing it isn't

5) Shipping times

This just screws up everything. The new launches are out way before the event is actually finished - Civil War II and Secret Wars being prime examples of that. Look, if you can't get it out on time, work through exactly what you are going to do. in fact, the more I think about this, the more I think every event at Marvel since House of M has failed to complete on time. Civil war I was so late, JMS had to tread water on a story for months

Yeah, that ought to about do it

The Marvel movies have been presenting the heroes as earnest and, well, heroic--and making billions of dollars doing so.  At most, their worst compromises are in the wardrobe department (though I note that the closer Captain America's uniform gets to the comic version, the better it looks on screen!).  The movies are still in the CONSTRUCTION phase of things, and hopefully will be for many years to come.

The comics, on the other hand, are in the DECONSTRUCTION phase, leading to debacles-in-progress like "Cap as Hydra/Nazi."  ("No, really, this is the way he's always been!  Everything you know is a lie!" from the writer and editor--and now, it's "Wait, we didn't mean that!  Wait and see!  Trust us!" from the marketing department.)

In a metaphysical sense, it's like the iconic heroes we've known and loved for decades have outgrown the confines of 22 monthly pages of "just" paper and "graduated" to the big screen or even the small (TV) screen, leaving their "ghosts" or afterimages behind for the printed page.  The best super-heroes are on screen, while the best comics these days are not the Marvel and DC super-heroes.

It's like super-heroes and comics have gone their separate ways--a great love affair where the principals have broken up and started dating others...others who aren't the best match for them.  (I really enjoy the movies, but I would still prefer seeing the main versions of the characters in great, well-done, monthly comics!)  It might be too late for Marvel and DC.  Good, honest and earnest, serious and smart, super-heroes can still come back to the medium best suited for them, but it might take a third, new company to publish them.

But honestly this thing is getting dragged out far too long. It's going to be years before this all gets resolved. When really this storyline should have been six months tops.