This worries me. I am in the early stages of designing/thinking about a ti road bike with very low gears and couplers. The ideal set up would be the SRAM with the rear mountain gears in a compact, but truthfully, it sounds like I would have a lot of issues dealing with the jumping back and forth from that to Ultegra on my carbon bike. And, since I got the Ultegra short reach brifters, combined with a short and shallow bar, reach is a non-issue. I may have to go with an Ultegra triple and a different type of mountain rd.
I am not good with changes, either.