#2 Lack of variety in the current crop of champions

WWE has its deepest roster ever. It's so deep and chock full of talent that it's hard for everyone to get onto either RAW or SmackDown.
But when you have five hours dedicated to your product, more people should be on either show than what is presented.
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Since not everyone gets an equal share of the pie so to speak, that means that a rotation of about 10-15 people is always featured on both shows.
It does mean that a core group of performers help to carry the show, but once again, the roster is full of stars ready, willing and able (not Gable) to help carry the weight.
Of the four main title matches at the event, only one person is a new title challenger.
Becky Lynch and Bayley are already multi-time champions. Randy Orton is a legend in his own right.
We all know the title lineage of both Rollins and Lesnar, whereas Natalya and Kingston have one main title reign each. (Nattie was the Divas Champion once before it was retired).
My main point is that a part of the reason why some of the fans have been a turn off is the lack of variety among title holders.
Sure, a bunch of different stars get to challenge for the titles but very few are allowed to run with them.
Creating new stars to get behind isn't hard as evidenced by crowd reactions at various points for Elias, Strowman, Rusev, Daniel Bryan and many others. It's just been WWE's reluctance to pull the trigger on alternative wrestlers.