I was in a similar boat back in 1990. Badly broken right tibia and ended up with a leg that's around 1cm shorter. I make up for some of that difference by shimming the cleat so it's less noticeable. But I just rode and rode, and while it took a while (well over a year), the right leg "caught up" size-wise. Strength-wise is a different story. For reasons unknown to me, the once-broken leg has a lot more endurance than the non-broken one. On hard efforts, the non-broken one burns first, always. Sometimes I try to consciously push harder on the broken side, but that's hard to do and keep a smooth stroke at high cadence.

Of course my break was at a time before power meters. Maybe the new tech will help you even things out faster.