you can still get Gale's romance and personal quest even if you don't spam long rests and his attitude soars in the early game.
This sounds to be like you were simply lucky.

Well, perhaps. I thought I’d just done the same things that in previous patches that resulted in zero Gale romance or personal quest progression, but you’re right that I may just have come across a slightly different permutation and nothing has actually changed.
I don’t usually spam rest in my playthroughs unless I’m specifically trying to romance Gale so I’ll see what happens in my other patch 9 runs.