This debate can go on and on and on, but there are two major issues to consider.
First, if the climb just get a little harder, then it's not the end of the world. Most hard climbs tend to get harder as they get older. The only place that I know of the improves as holds fall off (out) is Maple Canyon.
Second, my biggest concern is what would you glue it to? The truth is that behind that hold is probably a lot of dried mud. When we worked on "West of the Sun", we tugged and stomped on anything that was big. Some massive stuff ripped off leaving what I can only describe as mud acting as some sort of mortar. I hate to say that the hold on Ranger Bolts may have the same situation. You could try pouring gallons of water behind it, following that up with a muriatic acid solution, then more water. But, given what we saw, I am less than hopeful.
Just something to think about.