Visited L2A for a week's skiing in early Feb 2018 and was surprised by just how good some of the skiing was. Having not skied for over 7 years I was apprehensive regarding some of the reports: busy resort runs/poor grading of runs etc. But having skied the hills there is nothing to worry about.
It really does have it all:
Mellow blue runs - head up to the glacier and take in the views whilst lapping the T-bars
Long blue runs - glacier down to the resort base all in one epic leg-burning lap.
Quiet reds/blues - pop over the road to Vallee Blanche and wonder where all the people are!
Steep reds - take the Diable lifts and enjoy the corduroy at mach 4
Blacks - steeps/bumps/unpisted runs all over the place.
Slack country - some great, easily accessible lines off the Fee lift
Big back country - grab a guide and head over to La Grave.
Park - massive kickers or small jumps, take your pick.
Yes, it's a little confusing as the gentle runs are at mid station or up on the glacier. But is it really an issue to download back to resort at the end of the day? The narrow green (Demoiselles) can be avoided by taking the bubble back to base if you don't want a 5 min snowplough lesson, then use the drags to bring you back up to your accommodation.
IMHO, the run from the top of the glacier down to Mont De Lans is one of the best (and longest) in the Alps, with multiple options for avoiding any queues, and some great opportunities to lay down long Super-G turns and really open the taps.
To its credit, I did visit in a quieter week and the snow was epic. So we benefited from all the runs being open and the off-piste being bottomless :-)
The bars weren't cheap (6 euros for a large coke, 4 for a cappuccino at the mid station) but the views almost make up for it.
I'd happily ski there again. It's a big hill with big runs, big lifts and loads of terrain.