what are you planning to do for your 4 weeks of recovery? Just light stuff, AA, fly by the seat of the pants, take it off? Also are you including a deload week between each of your phases? How exactely are you planing to overlap WS4SB and 5x5 for 5 weeks?
Also, just my oppinion but I'd only worry about getting stronger, get that squat up eat lots of protein and the rest will come