I'm usually in favor of making trades to try and at least make marginal improvements. But this just feels like bailing water from a fragile, rusted out scow. Sometimes it's just time to scuttle the boat and start over.
Just ride out the string. Let Felly and Crawford walk at the end of the year (assuming Jamal exercises his option) maybe trade Wallace for picks (or anybody else we think might have an ounce of value) then reset this summer via the draft, via trades into cap-space and maybe a couple of strategic signings in free agency if they can talk anybody into it.
But for the love of god, no long-run, strategic moves that take on salary or constrain this team's flexibility with no full-time GM at the helm; get this team into a place where somebody with a damn clue and a plan can come in and actually make moves.