Whether or not you think the reticle is fast is up to you. IMHO it's not moot because I've shot both the EOTech and traditional tube red dots (Aimpoint Comp) and I thought the EOTech was much easier to use. Yes I keep both eyes open. The Aimpoint Micro (with your PA is a copy of) doesn't suffer from the same "tunnel vision."
As for battery life, it's not about how many batteries it costs. It's about leaving the sight on for 5 years without worrying that the one time you might need it to save your life, it's dead due to lack of charge. It's mysterious why none of these sights have a "wake on shake" on switch, but with an ACET Aimpoint, it is a nonissue.
Your Primary Arms red dot is a fine optic. If I did not want to spend money on an EOTech or Aimpoint, that's what I'd get. The EOTech XPS/EXPS and the Aimpoint are military sights, so expect them to be more durable.
As for the price being high, I don't really have too strong an opinion, if you feel that the Aimpoints and EOTechs are too expensive, you should not buy them. You are totally right, a lot of people buy them for cool factor. The thing is I don't understand people buying very very nice carbines or rifles, and then putting a $50 Tasco on them. It doesn't really apply to the PA red dots since they are actually good sights, but I always expect optics to cost around the same if no more than the rifle they are going on.