Yes they should this is a case where you have a number of guys who have earned title shots and you can make 4 main events with championships as opposed to 1.
Looking at the odds for the next UFC PPV the Main Event and Co-Mainevent are Barao is -900, Cormier is -1200. Those are "fake" Pride match odds who wants to watch those fights?
Don't forget the last three men who fought for the title they didn't really earn those opportunities, Hendricks lost, Diaz lost and Robbie Lawler while the feel good story of last year would never have been brought back into the UFC with a 1-3 record in his last four.
Clearing out the log jam at 170 is important but what is also important is getting people used to interim belts again because let me tell you some, Cain Velasquez and Anthony Pettis are not durable guys and while they lack the challengers Hendricks the need is going to be there. You can't have 1 HW title a year or hold off top talent like Aldo and Alvarez from getting those opportunities to be 155lb champion.
I think it might start confusing people like boxing with 3 titles each class. And over time would really water the meaning of a title fight down a bunch.
But I see what you are saying. Don't agree that an interim fight made Condit or Diaz what they are. Diaz was a Co main evented or better before that. SF champ. Put clinic on Penn. Was supposed to be in the big fight when he first stepped back into the UFC. Condit's KOs and record and style made him into an OK draw. Not that performance vs Diaz.
Same with Nog. Yea Nog ended up being a main eventer and not CC because Nog stepped in to the UFC and beat a former champ. CC was so hyped and came in and lost to KONGO AND GONZO. Nogs former standing as a fighter, the fact he won coming into the UFC, and the show vs MIR made him an OK draw, not an interim title fight.
Barao I don't count, what else was the UFC supposed to do in that class? Barao still isn't a draw. He would have ran through the division and been where he is at regardless of interim stuff.