The whole TIEs don’t have hyper drives thing is something that the OT put as a flaw in the first place. How would a rebel group have access to military tech equipment in their fighter craft that’s more advanced than the state of the art, well equipped empire. That just doesn’t make sense in the first place.
I don’t see the problem with having a few dozen highly equipped fighters going against numberless waves of cannon-fodder, just as Rebel soldiers tend to outmatch Stormtroopers one-to-one but are quickly overwhelmed by numbers. That seems very Empire to me. It would be stranger if TIEs had hyperdrives, honestly.