It should be locked, yes. On the eve of a comprehensive community proposal for Elrond, we have to make sure that a proliferation of similar topics does not stand in the way. It would only confuse people.
By the way, just by reading LoM's past remark, it's clear that the focus ought to be on mass-slaying properties. And that's where our oncoming concept comes in handy: through replacing a replica of hero-supporting restoration, we shall have a true mass-slayer and, most importantly, a lore-accurate portrayal of Vilya. It's also stated that further reworking on his character is not deemed necessary, although that dates back to 2016. Thereafter, so much has dramatically changed...

Elrond is meant to be Rivendell's AoE hero, and with three abilities to that effect (flood horses, his passive AoE damage later and Vilya) I'd say hes conceptually well positioned for the role. Of course, if his abilities are too weak they can be easily buffed, but I don't think more fundamental hero reworks are necessary here.
--- CLOSED ---