Yeah I use Metric A/B when mixing and it works great. I do use in Wavelab as well, which works great for external references but the “Sync” function doesn’t work in Wavelab so it’s hard to A/B perfectly to the demo which is optimal.
Perception seems like it would solve this but as it works on a plugin chain, but don’t know if I need it enough to drop a couple of hundred on another A/B plug.
Seconded to have smart bypass in the Montage!