I disagree completely.
There are several weapons that can perform better than the Suros Regime and can out gun them in it straight up 1v1 situation. Monte Carlo and Mythoclast spring to mind, especially the Mythoclast. But not just exotics either. If I run an exotic special/heavy, I use my For the people, not quite as good as my Suros Regime but its a trade off.
Anyway the main thing I wanted to say is that you cannot possibly consider nerfing the Suros Regime without also nerfing at least the Mythoclast.
Shadow Price when the max damage was 300 comes to mind. I have two SP with field scout and I used to love going toe to toe with SR guys and watching them fall.
Vanguard rewards for both of them. It was a pre-DLC assault rifle. The Vanquisher 8 from the New Monarchy has almost identical stats, but with a smaller magazine and different perks.