to avoid the queues you could start at somewhere like Morgins. I did it a couple of years ago and it was the weekend my riding 'clicked' – riding off the brakes, etc… You can save time by missing out Les Gets, or just do the Pleney back down to Morzine and that would save you some time.
We did it pretty relaxed, doing some of the DH routes a couple of times en route and not doing the whole circuit, and spending some time relaxing with some food and wine. If you enter both days you can afford to be a bit more relaxed about it all.
A bloody amazing weekend!