ReBuild Or Base

I hear a lot of good arguments for why to go back to Base. But what is the arguments for why not another Build? I am in a very similar situation. Gone through SSB1LV, SSB2LV, Sustained Power Build LV. I do not feel trashed, and according to intervals.icu I am mostly in the “grey zone”.

Having worked on my sustained power, I want to jump into the short power build LV. Is this a bad idea, and if so, why?