relentless has been gaining a lot of traction lately, especially if you're playing with some utility based third like ele/spriest/ret that can help out utility wise if you're in cc.
it's probably the go to for most of the games right now at least in my opinion as a druid.
adaption feels really bad, and for me at least it bugs out a lot and doesn't proc on things like a full trap even if it's up. i never know why.
you take trinket vs things that have win conditions like very quick 100 to 0 on someone like turbo where sitting a 3 second stun or something might be too late to help your team.
in 2s i usually always take trinket.
the only thing i can think of off the top of my head what adap might be okay into is something like tsg where every setup usually starts when you're hoj/legsweeped/asphyxiated/warrior feared or some shit