Suggestions to make Low Priority queue better

I've been put in there a few times now and have realized a couple thing in it...

• When the low priority queue timer hits zero, and you begin to queue up, but you then exit the queue, it restarts when you queue back in.
• The low priority queue time doesn't go down, even when you have good behavior, ever.

Suggestions to make it a little better...

• A 20 minute wait is fair, but honestly, a 40 minute wait to play a game is a little to harsh. Why not when the queue finishes, you don't have to be put in low priority queue again if you exit the queue. There can be a certain time limit to when the LP queue will start up again if you decide to leave the matchmaking queue.
• Having the time not decrease is kinda cruel, even you you show months of good behavior (last time i was put in LP queue was about November in the 10 minute queue). Why not decrease the amount by 1 minute every 4 games down to the first LP time of 5 minutes?

These are just ideas of how it can still be effective, but be more forgiving to those who do well, like the previous LeaverBuster system.