The problem is that once you have a number of cycles under your belt even after 2 weeks sd 15s are to be considered more or less another 2 week sd. With your plan you diet for about 4 weeks (2 sd +2 15s) almost without the the training stimulus (i.e. significant microtrauma) which puts the lbm...
my reasoning was:
if there's no significant diff btween leg and glutes contributions (which,in my maybe wrong understanding,means that load distribution on legs is the same in partial and parallel squats) partials are more effective when trying to get bigger legs bcause you can load more...
When i diet ,which means i eat low carb all day (100-120g including veggies), if i use simple sugars bfore w/o I suck (really low energy loss of pump etc) so my approach is :
1 hour bfore lifting: 30g oatmeal + 200g eggwhites
Bfore leaving for gym i have this shake: 20g whey + 10g casein...
I buy 96-97% lean beef cuts, grind them, remove the little visible fat, weight pieces of 100g, make pattyes and frooze 'em. (Actually daddy do almost all the work )