In my opinion, everything is a matter of regulation. SRAM requires fairly precise adjustment of the front derailleur. Their instructional videos and PDF manuals show it great. My bike was well adjusted because I bought a bike from a store where experienced people were. Don’t worry about it, even if the store doesn’t do it to you, you can do it yourself at home after reading the instructions. Sometimes, by trial and error, driving with allen keys in your pocket 
In the end you will set this prefect and by the way you’ll know everything about SRAM 
My bike is size L. I am 187 cm tall.
I thought about this frame size for a long time, I had ML size Propel before and now I have ML size TCX. However, in the case of the TCR I decided on L, in my opinion it will be more convenient for long distances (150-300km)