Sure I'm repeating this but...
The rewards are specifically tailored to it's long duration due to the cutscenes.
If you allow cutscenes to be skipped, in any capacity, then you have to reduce the rewards.
This means you effectively have two different options.
Long duration, big rewards.
Short duration, less rewards.
People will likely roll the roulette intending to get one or the other, and then when they get the one they don't want, will leave/kick to get the one they do want.
If it's two different options, then you may as well make that two different roulette options to ensure you roll for the content you want.
This then defeats the point of MSQ roulette, which is purely to fill queues for newbies.
As it stands, you know the roulette will take a considerable amount of time, you know what you're getting into, so you decide whether that's worth it.
If people are disconnecting to skip cutscenes, report them.