When we were teens, we still went with DPs to buy the tree, and left out our socks (or tights if girls - get more into tights than ankle socks
!) and exchanged present with everyone so lots of shopping, wrapping and surprises going on.
Even now (all adults and some DGCs in the family), any DC who sleeps in DPs house on 24th must put out their socks, and DF fills them with fruit, sweets and a book.
We also still have the Christmas Candle, which is lit by the youngest present (whether babe in arms "helped" by their own DPs, or the "baby" of the house who is now 33!).
Why not ask the whole family what they would like to do? What parts of Christmas are special for them, are there any things that you don't do that they would like to? And also talking to them about what they can all do to help get it organized etc. Would they like to do things like have an afternoon when their friends can come over and have pizza while you have wine and nibbles with friends/neighbours etc? Or a particular day going for a long family walk but clear boundaries that you don't expect them to spend all day everyday doing family stuff and they can have time on their own/with friends as well - but that you do expect them to do SOME family stuff together, and with a good spirit!
I like to go to carol concerts or concerts involving orchestral music - but I go at lunchtimes as DH and DD are not into that. But we have also done a "near Christmas" family movie trip the past couple of years as well.
If DD had her way, we'd probably spend Christmas night playing card games (and her probably suggesting playing for money, and fleecing us!). But we would be happy to play board games etc one evening.
And we are intending going for a long hike into the local mountains on 1 of the days, as we really enjoy that and don't generally have the time to do it. (DD is 12, and definitely wants to do some stuff together but have time to mooch around herself as well).
And we'll have family visits to do too, so that all takes up time once Christmas itself is over.