Yeah hope it helps. Was a pain to diagnose. The key for my situation was that after the AC had been blowing warm and right when it would go back to cold, you could feel the car jerk a bit when the compressor clutch finally would engage. It wasn't violent or anything that would cause a driving...
I had a similar issue with a 2011 Ford Fiesta. The car would blow cool air for 5-10 mins then blow slightly cooled air. This issue got worse and worse for me until it finally wouldn't even blow the slightly cooled air. For me, the issue ended up being a compressor clutch going out. Had to...