Bit surprised they dropped plumper Patel, and not based on what Briggs is doing. I'd have faced up Wright vs Patel, and while Wright may boast a 99no that was against a breed of dogs.
vs Afghanistan : Wright 99no and 0/1 vs Patel 0no and 2/6.
Both contributed, Wright more because of a bigger opportunity, but neither is really significant to what happens in bigger games
vs India : Wright 6 & DNB vs Patel n/a (bizarrely)
vs West Indies : Wright 0 & 0/11 vs Patel DNB & 0/38
Neither particularly covered in glory.
So thus far Wright has scored six runs and taken 0/11 from one over against any Test quality sides, yet is included. Considering the use Patel could prove with the ball you'd have thought he would be included, but Wright is probably seen as the better bet/bat when he isn't really.
LJ Wright (35 T20Is) : 480 runs @ 17.78 & 7 wkts @ 33.57
SR Patel (13 T20Is) : 81 runs @ 11.57 & 7 wkts @ 36.71
Over 1/5 of those Wright runs were against Afghanistan. I'd have picked Patel on more suitability in the conditions, but by the time England come to try it then it may be too little too late.