I just read this:
and was reminded that the Valar would not accept the One Ring at Valinor for destruction, and expected the Middle-Earthers to deal with it on their own.
The question is: Why? Didn't they regret letting the Noldor and Sindar duke it out with Melkor for years, only to woefully fail and have the Valar ride in to rescue them? What's the use in another round? Plus, it's not as though they're really letting them fend for themselves, they've sent 5 Mayar. They haven't even restricted themselves to, say, Vanyar.