The fact that you cannot enter back into sculpt mode to refine further edits done to the part AFTER you leave sculpt mode, and on the edits themselves that have affected the original sculpted object is very annoying. If you upgrade the sculpt mode to allow for both sketching/projecting and boolean operations whilst inside the Sculpt mode, you open up a massive opportunity for progressive sculpted design that was previously impossible due to the fact you cannot move freely between the sculpt and design modes to make progressive design changes as and when required. You are forced to go back to the original shape which most of time is not at all what is needed.
