I would absolutely choose something that is part of the official lightning specification over an add on solution which requires a web server. LND ignoring a standards based approach with their implementation doesn't make Bolt 12 the wrong choice. 

Also from Ocean:
"Using BOLT12 also allows us to prove to the world that a payment was made, the size of the payment, the node to which it was paid, and that it was paid by us."

Is the same true for lnurl (I don't know the answer but I doubt it).

Keysend is a poor option because there is no way to show who a payment came from.