The MFTs and The Wyatt Sicks are the kings of the tv feuds right now. Their stories are consistent on SmackDown without needing to hit any PLE, and it works.
I really enjoyed the Tama Tonga tension with the MFTs and how Nakamura got in his head.
Not every story needs a PLE payoff. With the Netflix and USA deals, RAW and SmackDown feuds matter just as much.