That's been my assumption also but along with that perhaps grouping some of the human girls together could work like instead of having Serene and Shauna be separate humans just stick em together. They are canonical friends so they could be hanging out together when you bump into them. Or my very subtle hint that a fivesome with the Flare scientists would be appreciated wink ;) nudge.
But its also clear that cuts need to be made due to the lack of Legendaries like even in your own example that's 3 out of 6 Pokemon unless one of those 3 have their own special requirement. Again, issue to be solved later Gen 6 is not anywhere near being developed we still have Gen 5 after Sinnoh