I feel quite sorry for you that these are your feelings on the game. Personally, I love the game. The backpack is fine for me (I rarely have more than my equipped items anyway) and I have loved the add-ons so far. They certainly haven't been no Zombie Island but they ain't no horse armor neither.
And really, a level cap? If they give us any more skill points they might as well just unlock all the skills for us so there is no variety. That is pretty much what happened in Borderlands 1, with 64 skill points you could pretty much max out two trees with some left over. Where is the variety in character builds then? Everyone had 6 strike bloodwings and healing revive turrets.
Gearbox have made one of the best recent IP's in a long long time, and I personally can not wait for all and every future sequel.