As much as I want to support your suggestion… no. We can’t.
People can and will abuse this.
Imagine your team is well known, strong, etc. Many people know you, and they also know that their odds of defeating your powerful team are minimal.
These same people are competitive. Maybe they are so convinced that they can’t win that they’ll be tempted to… not fight you in the first place.
So then, if you are a tad on the amoral side, you’ll be thinking ‘hmm I’ll just disconnect immediately from games where I come against these OP enemies, because I really don’t want to lose my rating to them’.
Which, of course, is unacceptable behavior overall for the health of the game. A person driven to go up the ladder at any cost, no matter whether they deserve to or not, will disconnect out of every game they aren’t sure they have a good chance of winning. They may, even, rig games, by disconnecting over and over until they match up against another team–a team that is agreeing to throw! All sorts of shenanigans could ensue.
No, we can’t have grace period sadly.
However, it does really suck that disconnects do happen.
Therefore, the solution is to continue to talk to the devs and advocate for changes that wil reduce the # of disconnects at the beginning of the game. If you are getting disconnected, report it, document it, help the devs figure out how and when these disconnects are happening. The more information the devs have, the better they’ll be able to finally pin down all the various ways (I’m sure there are many ways) in which players are getting disconnects that shouldn’t be happening.