Sounds great for everything except jail should be more like 5%. If you are dcing more than once every 20 matches, you should pay the price.
Also...a huge deal will be if it retroactively brings in either quits, total games, both or neither. If retroactively brings in total games but not quits, those people with 1000+ games can rage quit 150 times still without being punished.
A rage quit should result in loss and give the win to the other player, always. The jail thing should just be a supplemental system to humiliate the really bad offenders, not the main deterrent.