Well, some of it has to do with the UFC rushing them into big fights because they need to fill up a card like Till for instance most recently. He had the potential to generate a big fan base in the UK and they put up against Wonderboy in the UK where he was lucky to get a decision and then put him up against Woodley because Woodley was inactive and wanted a card that suited him, after Colby refused so soon, they needed an opponent and Till was rushed in despite him saying he shouldn't get the next title shot. It's not like boxing where prospects are given years to develop and beat up cans, if you got the UFC and win a few fights and generate hype, you are likely being put in with a contender and you beat a couple of them the champ.
In WMMA, you win one fight in the UFC and you are ranked, win two you are in title contention and win three, you are a top contender and likely title challenger. Which can happen after two or even one really. Or first in the org.