I don't think a fundamental solution was found or miners did what they wanted, but obviously, the congestion was relieved mostly with just few thousands unconfirmed at any given time.
As I see it, no need to change the core of bitcoin for something that can spontaneously solve itself IMO.

If you are looking for a sportsbook then the best options are Cloudbet (Which has live betting in size similar to DB but much better in odds), Or if you do not care about live betting Nitrogensports.eu has one of the best pre-live bitcoin sportsbook gambling odds, but just have 1-2 games daily for live betting (sometimes more, sometimes less).