Shram Shakti should be kept at 110. I'll justify it too, people prefer SS because they get to have a sound sleep through the night. Even with the current schedule it mostly reaches much before its arrival time. Speeding it up would make it reach pretty early in the morning in both directions, which is not desirable.
I know SS speed up hui hai (in terms of time). But if I'm not wrong, 130 speed upgrade vali list mein uska naam nahi tha.