Took 15 Ranger levels on the rebuild for exactly those reasons.
Mobility and Spring attack were taken more or less as being 'best of the rest' feats - the dodge bonus on each is nice. TW Defence, OTWF (for DA/Rapiers/Khops) or Dragonmarks would be just as viable, I just happened to like the dodge. I was considering a Dragonmark, but found the build to be too starved for AP to get them and still get the amount of sneak attack that I want.
EDIT: Just seen I missed out Quick Draw (assuming it still has it's unlisted property of speeding up use of action boosts),so that's 1 of the 2 feats used up. Humans have 1 feat left over (due to bonus feat), HElfs none (wanting QD for dual-boosting) and all others 1 (no need for QD as can't dual boost).