Arg I got patches mixed up, its Monday. I think it will be in by 1.8, not 1.7 but thats just what I think seeing as 1.8 wont be out til February-March.
It might be in feb-march, but even so I doubt they would mention it. Mentioning a new/better system would make ppl ask what was changed.
Ofc the patch note could simply state "improved the matchmaking"