After the Mists Part

With "The Mists of Lamordia" coming to its end, I've started giving some thought as to what comes next. I must admit, I'm sorely tempted to call it a day at that - hang up the mantle of DM and walk away. But the players seem to be really keen to keep playing, so maybe...

Three  things are pretty clear though:

1. I'll be taking a lengthy break before starting the next campaign. Certainly until we're back in the office, and probably a good bit beyond that.
2. We could really do with some additional players!
3. The next campaign needs to be a good bit simpler, or at least more episodic, than either "The Mists of Lamordia" or even "Storm King's Thunder" - both of those campaigns just had too much lore and too many moving parts for players to keep it all straight.

Assuming we do play on, I have some stuff concerning character generation to put forward:

• We'll generate our own "standard array" during character generation - basically, we'll go around the table rolling 4d6-drop-lowest once each until we get 6 stats, and then everyone will have those to use.
• We'll need to expand the options of class and subclass quite a bit, allowing the Artificer and probably all the subclasses from Xanathar's and Tasha's. With the Bard and the Sorcerer, in particular, we've kind of done the PHB options to death.
• I'd really like each PC to have a different class this time! Having two FIghters in the first campaign and two Sorcerers in this has not been ideal.
• I'd also really like each player to choose a race they haven't used before (with the exception of human - that's always an option) and a class they haven't used before.

But none of that answers the biggest question: what to do? Something different, I feel, but what?