It's all about the recoil pattern when you buff the stability. There are many 2-shot pulse rifles, but the grouping on the shots is very tight. In theory you could do this with any 2-shot, but you would need counterbalance to help the recoil on some of them. If you use hopscotch, then that is a free perk to use for what you want. It won't instantly make you a monster, but good pulse rifle users will find value in it. Tl;dr good recoil and high base stability