I don't know if one is necessarily easier than the other. They're basically almost the same age and are in a similarish boat where they are both very established but also coming off bad seasons. I don't think it's really a problem to sit vets who aren't worried about their careers. It's not a Rudy Gay situation, for example. Vets who are established and not concerned with their standing may prefer to rest instead of being stranded on the court with a bunch of kids.
IMO, if you make this kind of trade....you kind of overlook whatever tanking effects for getting a different/better asset. I think Huerter is preferred asset for most teams in the association, but SAC happens to be in a situation where they need another big badly and have an odd man out on the perimeter. I don't think every decision needs to be made with lotto balls in mind nor do I actually believe that the FO agonizes over it as much as the fan base. Huerter is no slouch. One year ago he was the type of player that everyone wanted.
Eubanks is a replacement level player or slightly above it IMO. I don't know where this sudden craze of using raw +/- on off has come from, but the advanced numbers mostly would agree that he's where I have him. I think he's better than the guys whose minutes would be taken by Huerter, and you would have to think no Collins means even more minutes for Kessler as well.