From my experience, EitR achieves the goal of reducing feat taxes quite well. I think my favorite of its change is consolidating the Improved Maneuver feats into two different feats, so it doesn't feel horrid to have a character who want to, say, bull rush and trip, while not playing a class with buckets of bonus feats. So if it counts, I'm all for using it.

Another question, mostly for the DM but also for potential party members. How do you feel about summoning characters? Since the preservationist is the kind of summoner that summons a bunch of things, I'd like to make sure people don't feel that that's problematic for their enjoyment of the game before I make my decision.