Originally Posted by
jimc101
Feasible, but expensive & ergonomically pretty horrible way to do it. Running a different feel left & right hand shifters will feel off, and the ergonomics of the 5700 are poor vs the 5800, you also loose the benefits of the new design and much better shifting FD that the 5800 series has.
I think you're off base. 5700 was good and fine. 5800 offers some minor improvements. Right and left shifting are already way different. Triples usually shift much better than compact doubles because the difference between rings is less.