Didn't say anything about his technique

Yeah it's probably not the greatest. I'm just going by his hand-eye.
Watch that shot where he hits Milne over long off for six. If you slow that down, you'll see that it's not pre-meditated at all . He's actually reacting to the ball, lol. Fast hands ,picking the trajectory very early and hitting a fast bowler like that and that too so effortlessly? This kid is legit. Sharjeel was "27" when he started playing regularly for Pakistan .
If you watch that, he has slog swept Sodhi, played cuts behind square and his technique looks much better than Fakhar already
Wouldn't judge based on AFG series. At least he was trying to hit while getting out. Young white ball batters are better off erring on the side of aggression rather than looking timid and batting selfishly. Needs to be encouraged to just get better at execution - like Morgan used to encourage. Technique actually gets better when you encourage aggression. Young batters will always find better positions to hit the ball. Just needs to be fine tuned afterwards.
Get him to Bradburn, Mickey, puttick and co. now. Babar was not very polished in 2016 either. Took 2 -3 years under Mickey and Grant. Saim Ayub needs that level of help rather than keep playing Pakistan Cup .
I think he's probably improved as much as possible at the Pakistan Cup level.