Think SR is overrated. A lot of bowlers can get wickets bowling badly. I remember there was an ashes match where Finn bowled awful despite broad and Anderson bowling decent, yet he ended up with a 5fer as the australian batsmen hit out at the end to set a declaration and he got wickets. A bowler that bowls with a good economy rarely bowls badly though, he might simply just be unlucky not to get wickets. Or the pressure he creates allows his bowling partner to benefit picking up wickets (as they target him).
For example Abbas and Hasan have similar bowling averages. Abbas has a much higher SR than Hasan, Hasan has a much worse economy rate than Abbas. Which is the better bowler over their career? It's been Abbas by a landslide IMO. And when you are leaking runs easily, you are letting down your bowling teammate who will struggle to keep pressure. Hasan Ali has a higher SR than Mcgrath too, who is probably the best fast bowler of all time. So I don't think it's the best stat.
Average is the best indicator really. But I do think SR is overrated, I'd much rather have a bowler who is hard to score off and keeps the pressure on.