They've got already a good roster and got some new addition from the draft for which we can also see new potentials from there.
But if it's for KD, we still need to see what's really for him and what team is really serious of taking him and getting that crazy deal for the trade that he wants for Nets.
And from that good roster, I think this is settled that the Golden State Warriors will not need anything, for now, for me I think the teams that will truly need Kevin Durant were the Miami Heat and the Phoenix Suns, but for the Miami Heat having difficulty in getting him due to lack of resources, and for the Phoenix Suns inability to get back Deandre Ayton, they need a bigger all-around man, so likely Kevin Durant can land on these teams or even on the other rumored teams that likely needs him, so let's just wait and see,
As it was mentioned before, the Nets won't agree to trade Durant anyway if they don't get an all-star player instead of him. In that case, Durant trade rumors to the Heat seem unlikely since the Heat would have to include Butler and a couple of bench players in the deal. Honestly, I doubt the Heat have plans to trade Butler, and it's unlikely they could offer any other deal which would satisfy the Nets.
I think this is still in the process, and choosing between Kevin Durant over Butler, is a big trade in my opinion Jimmy "Buckets" Butler is a great asset for the Miami Heat and I think even though Kevin Durant has a bigger value, but for me, Jimmy Butler and Kevin Durant, for now, has the same value as an all-star, so Miami Heat will surely be having a hard time about this, so the Phoenix Suns might have to say about this maybe Chris Paul for Kevin Durant, but it is really unlikely to happen,