I don't plan to update it, it's free to update for whoever wants to. The wiki on this site isn't very active in the first place sadly so its rather unmotivating for me to bother anymore.
Neither have a b-frame debuff. Ea doesn't offer anything but damage so she isn't a factor when choosing soul priority to begin with. So yes, getting D'art's Sniper Shot would be an improvement but if you want to get someone else you can just use Mordred for a much weaker version of D'arts debuff.
The thing is that it's not recommended you run content with elemental disadvantage, at least not early on like in your current state. Meaning you should also strengthen a second team to deal with elemental disadvantage, in your case, a wind team to deal with thunder stuff. So factoring in your soul for that team should also be kept in mind.