No! Your lineup is *perfect* the way it is. Murry is a MUST start at flex or RB2 - StL has the WORST run defense in the league, and Murry, while splitting time with Choice, is a MUCH better starter than Mike Williams who is terrible right now. Freeman is sruggling, Williams is dropping balls, and losing targets to P.Parker and A.Benn right now. You have a strong team - good luck!
I would play Ingram instead of Murray, personally. Ingram has scored in 3 straight games. They will get up early and need to ball control, and I like Ingram to have a big day. Murray, yes, could have a great game. But, I have a bad feeling about it. I think Choice will be used a lot. And, will most definitely get the goal line work. I prefer Ingram over Murray.