Some people are going to get upset no matter what anyone does. People who do not like the Incarnate system can skip it entirely or go and play something else, that is their choice. Quite clear there are people who enjoy having it in game and want it to remain. I am sure there were other reviews around the web who felt Incarnates were a great addition. There is no right or wrong answer.
Yes, this is a small volunteer group and any new major content updates are unlikely. With that said, the problem here as I see it is that people do not want to do any work themselves. For those that do not like it, what exactly is preventing them from using the available tools in game, here on the forums or on social media to seek out like minded players? Form a group, team up together and play the way you want with no incarnate powers at all. The solution to the perceived problem is there, just no one wants to do what would be required to correct it. They would rather someone else do it for them or force everyone to play as they like.
I can only speak to my experience here, but I have yet to see any "no incarnate powers" TFs advertised in LFG or any of the teaming channels.