It's ahead of almost all others in any other event as well. It's simply a damn good weapon for one of strongest (if not the strongest) weapon skill in the game. Ragnarok DDs will out-damage most players in most events.
I don't disagree with that, I don't know why they went for that.
Enhancing I can understand, but is not necessary at all. Combined with Haste, the magical Haste cap will be reached with about ~420 Enhancing skill, which can be easily obtained by just using Light Arts and some gear. Any more Enhancing Magic skill is only good for Regain, which is rarely an issue unless you have a specific Store TP set for it and Regen, which is nice, but not make or break.
The first part is only natural and DDs should have it for any endgame event. The latter is rarer outside of Legion, but it's also not excessively important with proper buffing (BRD and COR), no more than any melee should have anyway.
But that's the equivalent of saying that no event should require those things anymore, because VW didn't. VW was horrible designed in that regard, and the reliance on temp items to succeed was what many people hated about it, gameplay wise. I do still argue that you need the same gear for Legion as for any other endgame event, I simply don't consider "lower tier VW" to be an endgame event. Einherjar II, Limbus II, Nyzul Uncharted Area Survey all require good gear, so by that extension it's only normal to be prepared for it. When you said Legion-specific gear I thought you meant gear that's not useful outside of it, but all the things you mentioned would make people better all around, so everyone should at least try to obtain them (and some of them actually are easy and cheap to obtain, so there's hardly an excuse aside from not being bothered).
Regardless, like I said earlier, I do agree with your general sentiment, only I think number of players and reliable players are more of a bottleneck than event-specific gear.