For one, no you dont deserve a reward for sticking around, what are you 12? You made the commitment like any other you dont deserve a cookie for sticking around when you're suppose too.
For two, I agree, punish those who purposely disconnect as it's just difficult to keep playing when team are leaving, however, are they leaving because of non-helpful teams who are not reviving them?
I can very much see how that'd be a problem and want to leave, no team play, no team, why stay?
For three, Make sure the difference between a crash, disconnect or quit is actually noted because it'd be pretty ******** to have a cooldown or something because internet cut out.
For Four, For Honour.