Llorente coming on a free doesn't mean we won't be in the mercato for another forward, in fact the need is to replace at least 3 forwards, but since that doesn't happen overnight, it's almost a given we'll be upgrading on Vucinic or Giovinco with at least one more.
The RW is contingent on our formation next season. We could spend big on that position if we are moving to the 433, but if not, a chunk of our mercato money would go towards the SS.
Cb and LwB, especially the latter is a position that will be filled by shuffling around team personnel in swap/loan/makeweight deals.
I think we can be almost certain that a top quality SS/RW and fair quality LwB/LB will arrive at the club this summer.