Well the TE group is probably in worse shape than the WR group. DeGuarra will have to take a big step up and Tonyan will need to return no later than mid-season (I think it will be earlier) and find his 2020 form. I don't think there are any TE FAs left worth pursuing and a trade seems unlikely. It's possible Gluten grabs someone during cut downs. Gotta wait and see and we, well at least I, have no patience.I agree it's completely unrealistic to expect Watson to replace Adams. He was drafted to contribute from the get-go though.
The tight ends improving on the production over past seasons would take pressure off the wide receivers to contribute this season. I'm not sure it will happen either though.