If it looks good it's fine, but I'm not as optimistic as you.

I would argue that pan-and-scan failed long-term, perhaps even short term. I remember widescreen releases being available on VHS because a significant amount of people didn't like it.

Colorizing black and white movies...I can't think of any time I've seen that done in a commercially successful way.

I also think that a dub with lips that don't match is something people barely notice in the first place.