As HP points out, Biyombo may well have plateaued already.
How do you compare 21 year old WCS to 22 year old Biyombo? They are a year apart in age. I said in another thread... if your options are giving up Olynyk + #16 + #28 to trade up for WCS... or just sign Biyombo outright, which is a better gamble?
Forget about the assets it will take to trade up for a shot at WCS... Would you rather have WCS... who spent last season as a JUNIOR in College averaging 9 points, 6.4 rebounds, 1.7 blocks in 26 minutes with 57% shooting (62% from the line)... or Biyombo, who spent 21 games last season as an NBA starter averaging 7 points, 8.4 rebounds, 1.8 blocks with 55% shooting (63% from the line)
WCS. Rookie scale contract, plus RFA rights, means you can lock up a guy (if you don't poison the well) for nine years, with half of that time for pretty cheap.
And that's without considering that WCS has more upside than Biyombo.
upside: Dude just spent 3 years on the College level showing minimal improvement. Take his "upside" with a grain of salt. He's 21 years old. Biyombo is 22 and has spent the past 4 years on grossly mismanaged franchise.
Favorable contract: Who cares if it costs you #16 + #28 + Olynyk to trade up to get him (the price that keeps being mentioned). I'd rather keep the assets for something else and sign Biyombo. "favorable contracts" are overrated in this changing salary landscape. Cap jumps 20 mil next year. 20 mil the year after.
If we can agree that Biyombo and WCS are comparable players, I gladly pay Biyombo 10 mil over trading 3 assets for WCS.
How confident are we that WCS (after 3 years of college ball) is a superior prospect to Biyombo? Biyombo's stats as an NBA starter last year (in 21 games) were more impressive than WCS's stats in his 3rd year playing on the College level.