Achievements are like that for any game, they go from mundane to wild, it gives even the worst of players something to say "look at that I earned something", and the best of players to strive for the best, and those with no life to strive for the ones that require 5000 play throughs.
I can see what your saying, though most of those things haven't really bothered me. They are things in the game that do matter (no doubt there), but I simply don't judge fun factor based on a wall crushing me. I judge fun factor just on simply what it is, am I enjoying the game play in general, and for me thats a yes. Is there areas that need improvement? Sure, but overall I'm having fun. I think Path of Exile will have more content to the game itself most likely, but it most likely won't feel as polished, and will be harder to get into (the skill tree alone is insane, not saying thats a bad thing though).
I personally dislike seeing D2 as a bench mark, I enjoyed the first game a lot more, and the one thing I wanted to see in D3 was darker environments, more catacombs/cathedrals. If it remains like what we get in the Beta, I will be happy with that. D2 was just too colorful and too many levels above ground in non-gloomy areas.
Though judging a game you buy vs a F2P isn't so easy anymore. It maybe easy for you to step in and judge F2P games if all you played in the Korean crap out there. You need to sit down and play some League of Legends, thats an insanely polished F2P game, with a great model, so good other games of it's genre all went F2P just to compete. Back when D2 came out there just wasn't even the concept of F2P at the time, but there was many times when a great modder did something and was hired by a company because of that, and I would put that on the same level. Without the Desert Combat mod for BF 1942, we probably would have never even had BF2 (which would have resulted in the entire future of the BF series being vastly different), they might have landed on the name BF2 and had the same timeline, but I don't think the feel of the game would have been the same.
Either way, it's very hard to judge the game based on the limited amount of play we get. The complaints you have listed in order, 1st one I don't see a problem with gives everyone something to go for, 2nd one eh I don't trip traps then Barb leap into them anyways, and last one ?I never seen Diablo as a deep skill tree game. Mostly was cookie cutter builds and the rest of the talent tree was garbage besides the 3 - 4 abilities. It seems much more stream lined now, and the abilities + runes oyu get for them just seem to flow much better. At level 13 I got a leap, a pull, and a movement speed increase on my Barb, feels just right, keeps me in combat and keeps the flow going.
/wall of text
For realz...
It's a shit ofc. 
I pre-ordered the game! 
