Hi. I have already voted since yesterday for your proposal, I have been using v4v.app since the beginning to send Lightning to hive and do power up.
Taking advantage of the comment, have not you thought of setting up a p2p hive and Bitcoin lightning, something similar to lnp2pbot but between hive and Bitcoin.
I'm very unsure about providing direct exchange between BTC and Hive. My gateway is for real transactions like buying things or moving small amounts. It isn't meant to be an exchange for large transactions which is what I think would happen if I was doing transfers of main chain BTC.