My expectation is that most of us regulars will not have an issue in getting our name due to the fact we're used to logging in regularly and will be able to carve out a few minutes to initially set up our forum accounts pretty close to immediately when the forums open. Also how it goes when new servers open, for example. Especially since it is easy to change display names at any time we will be able to sort out trolling. Trolls will be treated very harshly. I do expect a few edge cases where legit people take someone else's name because they wanted it and just didn't know or whatever, but we'll have to sort through it.
The intention is to presume that people who have had the name prior and have made regular contributions to the forums will get the name in a case of conflict. Thankfully, this doesn't need to meet legal burden, although the idea of a livestream'd me as judge People's Court to sort through forum names sounds like a fun and extremely terrible idea.
Well i don't like that expected handling of the names. It is still too random. I know of people that deliberately try to pretend to be others with grieving purpose. What if you give all accounts, the same default name on the forums that they currently have now with 1 time deal button to opt out their historical name & choose a new 1? That way another player can choose that name only if the 1st person quit to it. That will give the original holder of that name, the chance to warn their friends about what will will be the new name so other persons can't pretend to be the 1st person.