I've made the decision to prioritize gaining size and strength over my BJJ time.
People who have never had an altercation with a big, strong, athletic person or who have never been big, strong and athletic constantly underestimate just how devastating size and strength is. It's taboo to suggest that in many BJJ circles, so I don't try when I'm not on a virtual soap box. However, I trained a sort of power lifting / bodybuilding hybrid in the past and was moving pretty big weights. My experience after training BJJ for a little while now is that that kind of strength with even the smallest amount of technique will roll through the vast majority of recreational fighters of a lesser stature. Not to mention, few things feel as good as being lean and muscular.
Now, I actually love BJJ more than weight training and if I could "only" choose one I'd go with BJJ. But, given that I'm just getting back into shape and I can afford to do both at the moment I think this is the best decision for me and completely understand why people do things this way.
When I do train BJJ I make the best of it. Because I don't train very frequently I focus on the fundamentals--I don't train the more fancy guards much, keep my submission arsenal small, and all I really care about is position. I try to play a small guys game despite not being very small. And, I pay for privates so that the few things I know, I can execute fairly effectively.
Also, IMO it's a total myth that the size and strength will force you into developing a less technical game. A person only needs to make the conscious decision not to use their strength when they roll and they can still develop a technically sound game. E.g. If I'm not getting a triangle while sparring I won't squeeze harder to get it, I'll adjust positioning. If I fail to make the positional adjustments necessary to cinch it up because my opponent is a step or two ahead of me, I'll forfeit the attack as I might be forced to if my opponent were bigger and stronger than me and I couldn't muscle it through.