Well I think the bottom line is that 4e proved that the D&D community was incredibly diverse. Some people like tactical endeavors complete with battlemaps and micromanagement. Others played the game more loosely, using no miniatures and using rules only when needed. Some players liked having a little rule for everything (even if they never used it). Others hated having all of those rules (feeling they needed to use them).
To a lot of people, that diversity made the DnD community strong. I would always read posts in amazement of how different people played the game... what they focused on.... what they needed to have fun.
For many the new system splintered the community by really "taking sides" and supporting a vastly reduced number of styles of play (versus increasing the styles). Nobody is wrong in whether they like or dislike the system. For some, the system supports roleplaying by removing the rules, for others it damages their roleplaying because the rules aren't there. For others, they just liked to have them, even if they never needed them. Same could be said for miniature combat, diversity of powers/effects, etc.
But the very nature of that decision is what hurts/angers many - because DnD never did that to us before. Every edition tried to streamline, but they also gave us more options. This edition for many seems to say, here is the style of play that is the D&D experience. It is always dangerous when you do this because your game style may not be others gaming styles. I admit I find WOTCs approach a bit strange - in their endeavor to bring new players to D&D they seem to have divided their existing customers in half.
So while a lot of people seem to be picking on Darren, try to imagine that you were on the other side of the argument. For many people, playing DnD was a pastime for decades... and now it simply isn't. For Darren it is even more so, because it affects his livelihood. I mean the guys has worked on projects for Wizards - what a dream come true - what a dream crushed.
I am one of those unlucky people that DnD left behind. I am lucky enough to have another system (True20) to fall back on. I have made my peace with D&D and let it go, but miss the wonderful diverse group of friends on EN World. I have been here since early Eric Noah days, and it is sad to see such anger forcing people away (on all sides).
Is 4e condusive to roleplaying? That is the problem. For some, yes, and others no. It is entirely subjective. For those of you that it works for, I am so glad for you (no sarcasm) - it is nice to find ones bliss in that perfect game. But try to have some compassion for those that don't and realize how unhappy you would be if it came out and shattered your favorite gaming experience.
Happy gaming all.
Patrick (Razuur)