If you add up all the contributions by the 3 bigs from last season (Smitty, Wright, Swanny) and the 4 from this season (Etou, Magnay, Edogi, Igbanu) and then divide them by the number of contributors you get roughly the same average of points per big, and last year's squad was actually better at assists per big. The only thing this group does significantly better statwise is rebound, but a lot of that has to do with the fact that they're not competing with guards that normally sky for rebounds like Shaq or Juice did.
I'm generally pretty tired of people putting down last year's team, but you've gone off the deep end in the opposite direction. Here are some actual numbers:
2-pt%
2016 bigs: 55.4% on 13.1 attempts per game
2017 bigs: 62.6% on 13.4 attempts per game
3-pt%
2016 bigs: 19.2% on 0.8 attempts per game
2017 bigs: 45.5% on 2.8 attempts per game
FT%
2016 bigs: 61.8% on 6.0 attempts per game
2017 bigs: 59.0% on 10.4 attempts per game
OReb
2016 bigs: 3.1 per 40 minutes
2017 bigs: 3.7 per 40 minutes
DReb
2016 bigs: 4.7 per 40 minutes
2017 bigs: 6.9 per 40 minutes
Blocks
2016 bigs: 1.3 per 40 minutes
2017 bigs: 1.6 per 40 minutes
I love those guys from last year and the guard play was light years ahead of this team, but I don't see any argument that production from the bigs hasn't improved.