If he doesn't make it as batsman alone, then that is more to do with his character than talent. He is a proper batsman and should in my view concentrate on his batting. I don't mind seeing him bowl 6-8 overs an innings but injuries withstanding, any more on a regular basis will affect his mentality as a batsman looking to score big.
This is absolutely what Pakistan needs.
Australia gets to carry Nathan Lyon - a spinner who can't bat - because they now have in Cameron Green a Number 5/6 batsman who can bowl five good overs in every session. Last season against India his bowling was not at this level, so he did not add the balance that he now does.
Mubasir Khan has the potential to be for Pakistan something they haven't had since Mushtaq Mohammad, who had the following features:
1. Batted in the Top Five
2. Averaged 39.17 as a Test batsman, and reached 50 in 29 Test innings out of 100.
3. Averaged 12 overs bowled per Test innings, and finished with 79 wickets at an average of 29.22.
That, in turn, would let Pakistan shorten their Test tail while adding depth to the bowling:
5. Mubasir Khan - part-time off-spinner
6. Mohammad Rizwan (or Rohail Nazir) - wicketkeeper
7. Shadab Khan - part-time leg-spinner
8. Faheem Ashraf - part-time fourth seamer
9. Hasan Ali - third seamer in SENA
10. OPENING BOWLER (SENA) / LEAD SPINNER (ASIA)
11. Shaheen Shah Afridi - opening bowler