A trade deadline CB would be interesting. Not sure what quality would be available, but someone over Valentine and able to challenge Hobbs as the starter would be nice. I swear Valentine has gotten worse each year. He still make big plays, but then gets burnt on the next. Nixon is fine - an average starting CB, but an upgrade on the other side would be nice. Perhaps Hobbs improves as he get acclimated to the system (lost a lot of time due to injury), but depth is still needed.
On DT, I thought Brinson played pretty well last week. Wooden and Wyatt have been surprisingly strong. Brooks has been up and down. Would like to see Brinson for a week or two more before saying it is a need. But even if he is strong, replacing Stackhouse wouldn't be a bad idea.
For trade outs, I think Enegbare would be a good choice. You have both Barryn and Cox that can fill the fourth DE. Maybe a player-for-player swap would be possible?