My goodness yes. Your RBs are beyond horrendous. Dump Gronk for a good RB and stream TE. You aren’t going anywhere close to the playoffs with those RBs unless you have some serious good luck
I’m with Swiss. You should get good value for Gronk and you’re going to need it at RB. OBJ, Tate, and Fitz would be a solid WR core in full PPR and I’m sure you could find a decent TE to stream. Plus you never know when Gronks going to stub his toe and be out for 6 weeks… get a high tier RB while his value is high right now.