It's true the Braves and Mets, particularly, have been more aggressive (though the Braves had no choice, they needed pitching, and the Mets have $. I wouldn't say the Nats have done anything; we could re-sign Jay Bruce tomorrow and it would be just as big a move).
More importantly there's a zillion players out there still. For all intents and purposes it's like the GM meetings haven't even happened yet. We'll see what Dombrowski has in store; still hard to imagine him playing things safe. Of course if they stick to their plan to cut payroll and are unable to trade any payroll, it will be difficult to improve on paper, but there are also going to be a lot of bargains.
In some ways they are very fortunate - clearly JT is their priority and one big move but unlike with Harper in 2019 they don't have to fill every hole before filling the last one, there will still be players left (so long as they do in fact sign JT, since catchers are the most scarce commodity).
I wish they were spending money; if not, I think they should, and inevitably will be, rebuilding. We'll see if this on-the-fence approach actually does add talent.