The PPDS route is nice. It’s very long but the lifts make it do-able in a day without too much effort and you can cut a few bits out. Start early, though to give yourself some margin. You don’t want to be in Switzerland when the lift shuts.
The routes from the top of Mossettes are reasonably natural. Quite rocky and loose in places, and the big hill lets you build up some speed so go careful.
Panoramic to Serpentine above Chatel is quite bike parky (but not jumpy) but its got great views. Won’t take long so you can squeeze it in somewhere. Maybe when doing the runs down from Avoriaz to Linderettes. These are bike park trails but they are more natural feeling, not bermy.
The two big loops on either side of Les Gets are pretty good too. A bit of climbing but it gets you away from the parks.
There are some off piste options that might suit. One off the saddle of the ridge between Zores and Avoriaz back to Morzine. Or the run to Samoens (For this you will need a (car) lift back but maybe it could tie in with a day out for the other partner)
Failing that just go riding. If you are based in Morzine its easy to go to most places within the area, ride a bit, do a few lifts, ride somewhere else, and so on. Roll home when done.
There is quite a nice way home from Linderettes that takes you past Lac Mondrian. That’s a nice play for kids so you could meet up there.