>>33414873I didn't realize how open the middle part of the game was until I replayed recently. Gyms 3 through 6 can be done in any order, and Blaine can even be your 4th.
If they do remake these games again, I wonder what they'll do to block you off. Changing how you get the PokeFlute or putting up more Strength barriers, maybe. I don't remember if FRLG changed anything in that regard.