I'm afraid you are going to have to talk to Loomis about DA. And, I know this is blasphemy, but given that Tyrann and Demario have come out to back DA, maybe at least some of this, to the extent that Lattimore doesn't like DA, is on Lattimore? It could also just be residual from MT who was likely close to Lattimore given the Ohio State ties.
But, assuming Lattimore isn't demanding to get out or making trouble in the locker room, I don't really want to trade him, but if we aren't in contention at the trade deadline it will mean we aren't likely to be in contention for the next two years. At that point it makes sense to get some value for Lattimore while you can since a 28/29 year-old (next year) shut down CB is a luxury at re-tooling/soft rebuild team can't really afford.
If you are in contention this year, you keep him and hope you can make some noise in the playoffs. If not, it's probably time to move on and his value will be the highest while he is still 28 at the trade deadline.