Alright. It's the "focus" I'm a bit concerned about. What did you mean by "focus" How often should they show up in a ten-episode season? Also, we saw only a small fraction of the UFP. I don't believe every UFP member was shown in Journey to Babel. Why do we have to "focus" on the races we saw in TOS, when there were likely unseen and unnamed races who were part of the UFP in this era, along with the neighborhooding races and the ones they would have been making contact at the time?
I've seen some fans say that Klingons were overused in TNG, and they didn't actually show up that often (aside from Worf obviously).