What was the patch yesterday? Extreme lag

I read somewhere that v2 engine is stingray, if it’s true, it may be a dead engine. I wonder if they’ll invest in a change (considering the 10 years thing fs boss talked about) and what will be the direction. Nowadays seems that also Unity is becoming more and more professional. When I tampered with it in the past (long time ago) it was not possible to manage a seamless map, but now I read about some nice features on their website.