It also has serious power creep problems, the power curve surges when you obtain legendary weapon/ancient legendary weapon/whole set are crazy and infuriating when you can't get the right item to drop and it's the only thing holding you from bumping up the difficulty. PoE is much better deeper.
The cube helps a ton with targetting specific drops though, much more than say, targetting specific high profile uniques in poe which involves a stupid amount of grinding and currency trading, or complete randomness(though there's cards now, but the droprates of cards seems to be only very slightly better than the actual items, so fairly unrealistic in general, not accounting for the fact a lot of them are shitty areas to farm for a long period of time too). You can easily complete sets by just spamming the set recipe and you can target specific slots a lot better than the shitty gambling system with the rare > legendary recipe for other stuff(for example voodoo masks or one handed fists or whatever, rather than just helm or 1H weapon).
But I agree, gear progression is kinda weird and in massive increments where you go from full rare leveling garbage having trouble doing torment 1 to instantly jumping to torment 3 fast clears with most 2pc sets or an ancient legendary weap, but then it evens out a decent bit, and there's stuff like guaranteed progression on legendary gem leveling and paragon levels which might bump you a torment until you get the right item and shit.
I'm looking forward to this season at least, the cube is really great to target specific gear and actually not get stuck too long, I agree the previous season I played(S2) I ended up getting stuck at some point and just stopping cause it was too annoying to mindlessly farm and then hope I could gamble a fucking starmetal kukri(especially with weapon bloodshard prices) or tasker and theo to see real progression and I also had trouble finding my 6pc set shit cause I kept getting the fucking boots or whatever. I won't play very long, but I'm sure I'll have fun for a week or two, and that's perfectly fine.
Edit: Deathwing it does allow respecs, but full respecs are extremely expensive and not worth it. That said, it doesn't take too long to reroll so don't think it's much of an issue. You can hit like 80 in a couple of days if you use twinked gear and stuff, so it's not so bad.