That may be fine for road based riding (road, TT, Tri), but with a MTB in the mix, a pedal-based power meter is a non-starter. There’s no way that using a Vector, Assioma, or P1/2 pedal PM would be a safe or good option on MTB. It is too fragile to handle rock strikes, and the cleats will clog in mud/dirt, or be shredded with any off-bike hiking or running.
Power meter variation is not impossible to look at or deal with. It is a better compromise than shoe-horning road pedals into MTB use.