If you're stuck with ASJ/Howard then yes. The truth is that the disparity between back-end TE1s and the full spectrum of TE2s is usually pretty marginal. Either you have one of the guys that is giving you a pretty clear positional advantage or it's meh. And Vannett has a clear path to opportunity which neither ASJ (Cole, Westbrook, Moncrief, Chark) or Howard (Evans, Godwin, Humphries, DJax, Brate) have. I'd argue that having a very clear path to opportunity is more important for TEs in fantasy then RBs and WRs since it's such a rare occurrence. If Vannett hypothetically sniffed the type of share that Keller and Cook averaged (19.7%), it would have been good for 4th best behind Doyle, Kelce and Walker last year. If it were to happen it would be very difficult for him to not be a TE1.
I'm not specifically targeting him in normal redraft leagues although I can see him becoming a ww pick-up at some point but in leagues where there's a premium on TEs I'm all over him.