Part of the problem with making the penalty in any way longer is that you aren't just blocking them off roulettes, you are blocking them them from all content through Duty Finder until the penalty expires, it might make people unwilling to touch the roulette if they have plans for later that day, such as Savage statics and so on, because they can't afford the risk of being put in an unwinnable situation such as an EX that won't be cleared no matter what. These are more flaws of the penalty system than anything, but they are still there and should be addressed before any other changes are considered.