BtB is the guru of course. And honestly you will continue to gain on anything at this point as long as you are persistent and progression focussed.
That said, I did what you are doing, then stalled a bit, so I moved to a lift a day type program where I absolutely hammered one lift and it's muscles once a week and a I took off again.
I'm sure there are proper intermediates that do full body, but then again at a certain point you need to hammer away at some growth in some very particular areas if you want to make your goals.
Hit some Squats, then quads hard
some bench and triceps hard
some OHP and some shoulders hard
then some deadlift and some hamstrings hard.
See how that treats you. If it doesn't work, you can always go back to what you were doing. But, bottom line is that what you were doing, you will adapt to. If you want to grow, you have to keep upping the ante.
I am Anton Zdravko Martin!
Best meet lifts: Sq 150 Kg (330 lb), Bench 120 Kg (264), DL 160 (352) @89 Kg (197)
Best gym lifts: Sq 375, Bench 280 (pause), DL 385 @205 or less
Goals beyond my wildest dreams, 600 Kg raw total, 200/160/240
Hack away at anything which isn't essential. Do what you love, and do it often. Fazc.
Everything competes for recovery so more assistance is not always the best idea. miked96