He's 22 wicket @26 that's not too shoddy. I think the fact the other two are insanely good just makes him look poor by comparison. He's way above Swann and Finn for their counties
It's a difficult one. Wright does do a job as a bowler but if it's just on batting I think i'd keep RHB in, he did at least stick around for a bit in the second innings and did pretty well the game before.