Just looking at the West standings from last year...
OKC 60 wins
Spurs 58 wins
Nuggets 57 wins
Clippers/Grizz 56 wins
Warriors 47 wins (6th)
Lakers 45 wins (7th)
Houston 45 wins (8th)
I could honestly see it taking 50 wins to get the 8th seed next season. I really don't see why OKC, Spurs, Clippers or Grizz would win less than 55 games. The Clippers did not get weaker, nor did Memphis. I guess most are expecting Denver to not win 57 games being that they lost Iguodala. I do think they are good enough to win 50 though.
I don't expect the Warriors to pick up 10 additional wins, but they will be close. Maybe end up with 54-55 like the Clippers/Grizz. The Lakers will drop out. Matter fact, I really can't say the Pelicans will get that 8th seed. Injuries will be their biggest issue with Tyreke and Gordon. Minnesota may end with that spot. I also expect Houston to be in the 54-55 win range.
So, there are 6 teams I could see winning close to 55 games this season in the West (OKC, Spurs, Clippers, Grizz, Warriors, Rockets), which is only 1 up from last season. Being that injuries are a big part of the season, one of these teams might fell at doing that and drop a few games. Tie breakers are going to be HUGE.