I had the same thought "are they crazy another terrible idea in a month filled with terrible ideas"? and posted as much already but on thinking about it further;
Okay maybe Wayfinder wont be filled with looted out veterans who've done everything and can't be arsed to help a newb out, there are positives although I think this choice is a little daft on Turbines part the player base could make it something positive.
Everyone who's not an elitist uber player start a lvl 1 toon (and a Vet 4 and 7 and a Bladeforged 15 if you have them) on Wayfinder and help new players, in a few months we'll have the least "BYOH STRONGS ONLY SELECTIVE DON'T SUCK" server community in the game.
I am thinking of starting a dungeon crawler guild over there, not perma death, but explore, complete and enjoy the journey. I think it might be fun to run quests purely for the fun of running them, not spoiling everything with "that optional is not enough XP to be worth doing" meta gaming. I'm sure some newer players will develop into hard core elitist types, but it's would be interesting to see if a more friendly grown up and mature (and relaxed) community could be made in DDO.
Wayfinder is an interesting opportunity. Friendly helpful players can turn a puzzling game endangering decision into a positive new player friendly server...