people sometimes complain about the fact that events don't cover enough playtime to get all the things you can. they also complain that it's not fair not to get a chance on an event because they can't access SK for reasons. there were suggestions to fix this (namely, put the events in a "very very low chance of happening" while playing, or cycle them more often), so here is mine.
yeah, making them unlockable by paying real money (or ce if OOO decides to be gentle) would be great. at least there would be a way to satisfy everyone. obviously it would work like OCH: you have to get it if you want to join a party in the event level. we could also give more of a use to the expansion tab, since right now it's next to none.
the events should be Shroud of the Apocrea, Grinchlin Assault, Kataclysmic Confrontation and March of the Tortodrones.
March of the Tortodrones should have an attached level in which you can get the glyphs.
Katacysmic Confrontation should be replayable.
Which events?
IMO Save Winterfest would be a horrible mission to unlock via DLC because that allows for farmable slot usables (via the boxes).
Would there be limits on the daily runs? (Ex: Kataklysmic allows one run per day but as many encounters in the arcade during the event - would this be reproduced if the DLC is bought? How would this work?)
I think you need to develop a strategy, list of events that could be bought, and so on.