Unfortunately account migration is not a thing. I'd like it to be as I'm going from PS4 to PC myself. Queue times are better on PS4, but match quality is lower
Cross progress would make the community way better. I would play on both PS4 and PC if that were the case, Currently I just play on PS4. I do own the PC version(got it during a free week) but haven't ever touched it cause of all my progress.