FFG made the x-wing specifically so you couldn't field five at once. 5 x-wings would be really powerful...
Sorry to rain on your parade...
But if we are talking about an x-wing fix, we need a barrel roll...
Yeah, back before Wave 1. The Kihraxz is a thing that exists, you know. And you can run 5 of them. This argument doesn't really have much validity anymore. I mean, you're right; The X-Wing DOES need some kind of repositioning option to be good at dogfighting. But i dont think running 5 X-Wings would be that big of a deal.