I don't know if we'll build through the draft alone but the draft will force us to build something either with picks or trading them for current players.
Presently we have players still on contract for at least 2015-16 filling every roster spot. It's not like our only center we have is Colton Iverson or pg is Pressey.
Smart, IT
Bradley, Young
Turner, Wallace, Crowder??
Sully, KO
Zeller
If we draft Portis and Mickey/McCullough/Wood/Upshaw/etc. we will have a massive jam at the 4/5 where at least 1-2 guys will not be getting enough minutes. This is why something has to happen there either trhough trading some of the current guys or the picks.