Apologies in advance if this is not the appropriate board for my question.
I've encountered several clients with multiple domain names who, for whatever reasons, have their domain registrations handled by just as many registrars, including quite a few sketchy outfits that look like they might be run by some high school student. I have no reason to believe this setup was strategically planned on their part.
Should I leave well enough alone or in these cases should I encourage them to transfer the handling of their domain registrations to their web host (who also is capable of handling registration)? It would certainly ease administration, and allow them to only need to maintain one set of credentials, since they never have their login info for these obscure vendors anyway. Generally their web host is a major player (Dreamhost, GoDaddy, etc.) whereas their registrar is not.
Thanks!