Maybe I'm just being sensitive but it's almost like someone was discussing a way to regrow a missing limb and you've come along to tell us you've always fancied a third hand.
I don't think one negates the other.
Are you sure that colour blindness would still present an issue? I've heard that in recent years the requirements had been relaxed around this.
I _think_ the key point is, as you said, that the different gene copies need to have different response ranges, or you end up functionally trichromatic even though the pigments are from different places.
If I have to give up these traits for better color vision - no thanks. I'm uncertain there is a correlation, but I wouldn't be surprised.
Apparently I'm a moderate deutan according to one of the online tests, but the only time I have any trouble with anything is with the colour blindness tests, in real life, never - completely fine with electrical wiring, photographic re-touching, display reading etc etc.
I've never mixed odd socks, worn the wrong colour by mistake or anything else apparently colour-blind people have trouble with.
Quite happy to keep better night vision and ability to wander around in bright sunshine without squinting vs a completely non-impacting deficiency. :)