Also, keep in mind that the following are also flaws in Universe that may require workarounds:
Free Agents will still appear liberally in Universe as surprise opponants, and the like.
I'm not sure what the answer to this is, although I recall hearing that there's a way to create a brand and stick them on there, and not have that brand selected in thjat show's "category of guys to pull from" roster section.
Also, if you unlock all the titles, they all have to be stuck on someone. Titles can be vacated in Exhibition, unfortunately they can't be vacated in Universe, so you're going to have people use the alternate belts and the novelty belts floating around whether you like it or not.
If they aren't officially "set" in your brand editor, they won't be tracked or ranked, but those title holders will still show up wearing them constantly. Since there are over 20 unlockable belts, it starts to feel a little devaluaing when 50% of your roster is a champion of some kind.
The most common fixes for this, obviously, is to knowingly stick these belts on someone that you've specifically set not to appear in this mode.
Also, the two alternate DLC's of Classic Edge and Classic Christian are also not allowed to be used in Universe and aren''t tracked and apparently can't show up (becuase they are doubles of the real guys). So, you can also just stick as many titles on those two as you can, to get them out of Universe as well.
Those are just some helpful hints to control Universe a bit more for your liking, so that everyone and their grandma isn't a champion of some kind.