Ya good point, turnaround time is a huge factor for sure. A separate veg room makes things alot easier and faster if you can always be putting mature plants right into flower, and your GPW on the flowering room will be good but its cheating if you don’t take the veg time into account!
As far as feeding goes I think you’re better off being on the low end of max vs over the line. I think overfeeding is harder on plants than underfeeding. The ideal is running a strain multiple times and taking it right to the limit, its pretty much impossible with a mix of genetics or something new.