Seeing as how HCS is based in Scotland, and the majority of Eldevin players may or may not be from the U.S., I'm not sure if a Thanksgiving event would make sense next week(Canadian Thanksgiving already happened a couple weeks ago, for instance).
We'll probably see a Winter/Christmas event, hopefully!
I love the solo dungeons and would love to see more of them, but as others have mentioned, I am concerned with how much gold/exp can be gained from repeating Story Mode dungeons over and over.
There needs to be a fine balance struck between having an enjoyable, solo-mode alternative, and being too lucrative to pass up.
(Alternatively, overworld grinding rewards can be boosted to compensate).
I love the idea of level-locking and wish it was implemented in several other MMO's I've played. Sometimes, it's fun just seeing how beastly you can get a low leveled character. Was an all-time favorite thing to do for me in Atlantica Online, before they nerfed the heck out of it.
Just make sure that the on/off option explainsvery clearly that you will not gain any exp while locking is turned on. New players unfamiliar with the system might become unhappy if they turn it on by accident!