Trouble with color changing method
I'm using Pr 24.0. In my program monitor are four claymation lips (Character Animator puppet). (My timeline is four tracks, each set of lips on its own track.) Upper left (red) is the original color. The other three clips are recolored with Pr effects. The blue and green came out "okay", although I would like them to be a little more crisp and bright. The bottom right is the most frustrating/confusing. Hopefully I can get some guidance that will help me with all three recolored clips, however? Please and thanks in advance. First, three screenshots:
My attempt to recolor the bottom right lips yellow with Lumetri:

My attempt to recolor the bottom right lips yellow with the Color Replace effect:

My attempt to recolor the bottom right lips with the Change To Color effect:

My questions:
1. Obviously, the Change To Color effect got the best result by far. But, I'm reticent to use it because, of all three, it's the one labeled "Obsolete". Since I'm doing multiple episodes with the animated lips, I don't want to use something that will completely disappear soon. Can anyone at Adobe say how much longer I can expect to be able to use this effect?
2. Much bigger and more confusing is: WHY is it that the obsolete effect is the one that works the best? I realize that "obsolete" means old code and it cannot be kept around forever. It will eventually be incompatible with Pr. But why is it that the newer effects can't do the job as well or as easily as the old code did?
3. More confusing: the same "Change To Color" effect is available in After Effects, and I've used it there before several times with just as great results. In Ae, it is apparently NOT an "obsolete" effect. ??? Under the circumstances, am I correct in assuming that if I want to use this effect long term, I should import these clips into Ae first simply to use "Change To Color" because it works there but may not work much longer in Pr? I'm struggling with the logic on that. It seems like a very unnecessary extra step. Is it truly the same effect in both apps? Why is it obsolete in one but not the other?
4. Am I perhaps just using the Lumetri or the Color Replace effects incorrectly? I have watched multiple tutorials and did as much tweaking as I could with each, but I just couldn't achieve a bright, clear yellow. (Change to Color was perfect and fast.) YouTube teachers seem to be able to get results that I can't for some reason.
5. Which leads to my final concern, which is: are my specs the problem?


Thank you to anyone who responds.
