Ranked Ladder problems: Broken replacement system, and laughable punishments.

Most annoying problems on ranked ladder I've been experiencing lately are as follows:

1- There are no replacements if someone leaves and ruins the game for the other players. And leaving the game means merely 7 minutes as a ban.

2- But if the whole team leaves (for example when it's 3-0), they will be replaced instantly with a full 5-player team. Just as you think you won that game, the new team might win the remaining rounds against you. That is so ridiculous and frustrating. Either you lose and get deranked because of a game you already won once -obviously-, or else the other team loses like after one round and gets deranked which is even more awkward.

3- And I really don't feel safe against cheaters. It seems to me that a game which bans you for 7 minutes for leaving or teamkilling, cannot punish nor detect a cheater, let alone dissuade potential hacker wannabes. It just feels so.

I might have some humble advices aswell, if at all considered by someone from the DevTeam:

1- Add a "Ringer" feature, as in: When queuing for a ranked match, we would be able to choose if we want to join an already ongoing match as a replacement. And if we join as a replacement, we shouldn't get a derank if we lose, but a rank up if we win.

2- When every member of a team leaves the match, it should be counted as an automatic win for the other team. It is really not excusable, it is plain nonsense.

3- Punishments should be more dissuasive. If your team would suck and you'd leave, you shouldn't get a 7-minute ban. It's just a pee-break. For example (maybe like in CS:GO) first leave should give you 30 mins, the second 1 hour, the third 24 hour and so on. This cycle might be reset every week or so.

Thank you if you've read at all.

Edit: You can always give bots to the team with leavers..