God, someone finally said it - I've been thinking about writing a post myself, instead of posting here and there in threads.
I feel they took him in a total wrong direction, with way too much minion focus, and made him into to an entirely different champion - I would be oh-so-happy if they would do a full revert, hell, I'd even take a Kog'maw level revert. Though, worst part is, Riot seem almost unable to say "yup, we did it wrong, let's try again later" and instead wastes energy with small changes and nerfs, when it's the kit itself that's problematic. Please just face it was a dud and start over - I beg you... I'd be happy to post ideas in a forum if it was ever open for discussion. Where do I sign the petition? ;)
It seemed some of the concerns of the developers was the R to win vs. squishies and vice versa too dependent on R. How QSS made him far less useful. Too easy to gank (hard to position right). Voidlings fading to irrelevancy for AP Malz. To do that, they watered down his base damages and scaling, removed ult damagewise, moved alot more power to Voidlings (who are wildly incosistent in their performance), made it super easy to block skillshots with W and pulled a random shield from out of nowhere and have had trouble balancing him ever since.
The way I see it, they had some of it right, the intent, that is - imo, he was too R dependant, and I felt pretty meh when it wasn't up. Sure, Q could chunk and change TFs with the 3s silence, but if missed (easy to do if people are good and the increasing mobility), I was pretty useless. E/W didn't do damage fast enough. Voidlings became a non factor.
So, as I see it, they were right to switch some power around, just not the way they did it. If anything, his entire rework should have been in line with Annie's instead with small changes/tweaks, as he was already one of the most well balanced mages - seeing he was almost untouched for a looong time before rework, only changed with the introduction of keystones (looking at you DfT).
I'm all in for a revert, or a "Kog'maw"-esque revert, that could look something like this, for starters:
Passive: Pre-rework, with Annie bar and the addition of 0,1-0,2 AP on minions
Q: New one, no E refresh
W: Pre-rework
E: Pre-rework
R: Pre-rework, half damage to offset the new voidling damage
Now, that was just an idea, that would help alleviate some of the concerns, with him being less R dependant, with more power on voidlings, easier to read his "danger level" with # of voidlings active, and overall able to contribute more than a simple "find picks" bot. Also would be harder to block linear skillshots with it (far from impossible, as I did it plenty of times before), and if Annie bar is implemented, would have to set him up to spend his charges before CCing.
There's tonnes of ways this could be tweaked too, as say, W is a little bland. You could implement the shield on W having it activate a 50% dmg reduction for 1 sec if standing on W. Or, it could do low initial damage, but do sizeable portion of it's total damage on fade out - making it a great zoning tool. Point is, there's so much you can do - if only you'd be willing to accept it was a failure.
TLDR; plz revert