Adding turbo plasma rifle would be nice. I'm afraid it wouldn't change much though, since anything that gets in the range of a minigun usually dies.
Gattling laser is available, but pretty useless anyway.
As
this movie clearly shows, almost nobody use energy weapons in PvP anymore after critical hits nerf (it's maybe 2-3 laser snipers out of about 60 players on the field). TPR can make some alternative for a minigun at close - mid range. I think it would be the best to just add it and see what happens.