Are we already forgetting about the poor Tapas?
Making them breedable will not make people more willing to take them into a boss battle. Most players are too afraid to take even their old breeding stock into boss battles to help out as it is.
I don't think/feel like adding a mod to make a specific dino/creature is beneficial for the the overall health of any server. Once all is said and done, you would end up witha server with 20+ mods where when one updates, it could cause others to break, due to conflicts or the server could just crash once you start adding xyz to abc. At the very least, it could be like the ecos mods, when they get an update (which is not often thankfully now) the server might have to be restarted just so people can join the server, just so one creature can be bred.