Why complain about things you can't change? Because you -can- change things. I know from a personal experience that I hated the missions in Carmageddon 2. I wrote a few letters to SCI whining about the missions, and the result is Carmageddon 3 had completely different missions. Still not good missions, but at least much better ones.
With all the fuzz going on about mana vs non-mana right here in this forum, I would assume Obsidian have heard us by now. Ignored us, yes, but at least they hear us. And since they hear us, they will think at least twice about adding mana to their next game after NWN2. I'm not sure if it's NWN3, Kotor3, Torment 2 or whatever, but it won't use mana. Because we whine about it.