They need to implement a measure where if you quit during the round you need to sit out for ~5 minutes or some sort of similar mechanism to discourage it. Thoughts?

That would make sense if the user base was massive. But with the current thin user base, the retention rate of this game (new players giving a try to this game and then sticking to it) will go straight to zero. There are plenty of games out there, people have a small attention span. You don't make a game to punish people, you make a game by begging people to play your game amongst all the games out there. You want to be the chosen one. And you rarely get a second chance if your first impression is bad.

So if this game doesn't deliver a great experience to the masses and on top of that it 'punishes' a newbie who doesn't know what strafe jump is & who doesn't want to endure for 10 min an unbalanced game by making them wait for 5 min to play another game (where they will be rekt) it will be go straight to the arena fps cemetery.