Originally Posted by
Kommisar89
None at all, this is a purely theoretical exercise at this point
I've never used Shimano levers, only Campagnolo and I really like them. The only reason I was considering 12-speed Ergopower levers is the information I had said they had the same cable pull as 11-speed Shimano. How would the 11-speed Ergopower levers work? Isn't the cable pull different?
If you have to get a new RD, why use a Shimano? Shimano 11 speed derailleurs have a different pull ratio than your old Shimano RD.
I don't know what Campy front shifters are right now, but some of them were no longer "friction" as of several years ago.