In reply to BarneyLoosemore:
I've been to Chamonix loads of times and personally, I've never bought a lift pass - rather individual tickets as/when needed (though to be fair my priority is staying at high huts). With all the closures, won't they give you some kind of refund? I think it might be a mistake to feel obliged to use the lifts and become a slave to your lift passes, especially given the closures.
Having said that, there are many good routes utilising them. I'm not sure what makes sense this early in the season (I usually go much later), but some ideas that are not too hard:
Aig de l'M voie normale
Petit Aiguille Verte - various options / variations on voie normale
Aig Crochues traverse
Aig du Belvedere
Index
Les Mottets (sounds like you're already familiar) - these long multi-pitch routes are great if it's the sort of thing you're looking for; I think it would be a mistake to miss these just to use lift passes if they are otherwise suitable for your group. Via Corda Alpina and Voie Caline are perhaps better known than Princesse (similar to the others with a very slightly harder crux pitch).
Go to Montenvers, either just for a wander on Mer de Glace or to the huts above. Couvercle is obvious (Les Courtes, Pointe Isabelle), but also the Requins Hut is a lovely less visited hut (sometimes used as a long route to Mont Blanc via Aig du Midi without using telepherique - anyway, can be used as a way to get higher up).
https://www.alpine-guides.com/climb/planning-your-climbing-trip/alpine-clim...
is a very useful link. This gives links to many more pages, including Chamonix Mountain Conditions and route reports.
Hope some of that's helpful!