So sort of like Apple...good marketing and they fix shit when it breaks, otherwise pretty much the same as everybody else
Bigger screen should be moot when shooting with a red dot, you keep both eyes open unless you have a magnifier for longer range...I'm curious by what a "fast reticle" is supposed to be though, I use the circle/dot reticle most often but sometimes the crosshair
I haven't seen any that have really "bad" battery life...mine uses 1 AA and gets 1000+ hours, even at 1/10 of that though the price difference would buy a shit ton of batteries...
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.
As far as the "fast reticle", it's probably easier for the average person's eyes to pick up the dot in the middle of the 65 MOA circle on an EOTech sight than just a normal red dot.
Not just that, I mean if you're just trying to hit a man size target at 20 yards and closer, the 65 MOA ring is a lot easier to pick up than a 2 or 4 moa single dot.