The logic for picking him JV was because he turns the ball away from the (many) West Indian left-handers (which is the right way to bat just quietly), whereas Martin, Astle, Nethula, and Vettori (tho he isn't up to it anyway) all turn the ball toward them - as does Sohdi.
At the end of the day a good bowler is a good bowler and whilst "ideally" it would be great to have an offy, he also needs to be at a level where they can be confident his performances will challenge the opposition batsmen. And whilst people will bang on about spin-friendly pitches that won't make up the pure gulf in class between this guy and batsmen the ilk of Gayle (if he can be bothered) and Chanderpaul, and their mates.
Some are saying he has potential and good movement/action/bounce/turn etc... and that's great - but he's 27, has played fugall 1st class matches and averages just under forty. If he does have those attributes - send him on the "A" tour and see if/how he develops (which was apparently what they were going to do before Dave pulled the pin).
It's akin to saying the Phoenix have no natural left-footed wingers to play wide on the left so they pick a guy from Central League who is one. Crazy stuff.
Having said that, I hope I'm proven wrong and he canes it!