That was NOT the best game OKC has played this year. Their first half was one of their WORST this year.
That said, they were on fire in the third at the same time the Lakers went ice cold. Pau also got hit with 3 fouls in the first 3-4 minutes of the third which earned him a seat to watch his teammates get it handed to them all quarter long. OKC is too good a team to give a 18-point lead in the second half and expect to come back. They tried but it ain't gonna happen. The Lakers definitely could have played a lot better, but so could OKC -- especially in the first half.
I love Fisher but the trade for Sessions needed to happen. He does make a difference -- a big one at that. Unfortunately it won't be enough to beat OKC in a seven game series. Everyone else in the West yes, but not the Thunder.