The Doosra is important because it is an art that is mastered by few. There is no point restricting the creativity of the players. He(Ajmal) has been tested in various labs such as Loughborough et al and has been cleared of chucking. So he is not doing anything illegal. Yes, Broady and Vaughan might share photos showing his bent arm, but at the end of the day, his action is legal because it has been proved. Unless the ICC decide that his action is illegal after tests, he has full freedom to bowl it. And moreover, none of the umpires complained to the ICC, so why the fuss?
Im all for innovation & the doosra has certainly helped off-spinner become dangerous again, since the art of traditional off-spin was seemingly dead before Saqlain invented the delivery in the late 90s.
But the 15 degree's thing that the ICC created after the Mural chucking saga in the late 90s - is similar to the Duckworth/Lewis rule for rain affected games, in which our fan have been told to accept it, but none of truly understand it & that lack of clarity has tended to divide opinion.
Non of us have ever actually seen a reported bowler tested & as i mentioned in the start of this thread, I am skeptical as to how bowlers like Ajmal/Hafeez/Senanyake for example have only been called once and cleared - while someone like Shillingford from windies has been called so many time sin the last few years.
They tell us the naked eye is a optical illusion blah blah, but i would really like see bowlers tested in the lab - because i dont see how they are saying Ajmal is fine - but Shillingford is not.
This is why the ICC has recently stated, they are looking to implement "in game live testing of actions" - that is the only way to conclusively get to the bottom of this, because their is a strong belief out their that some bowlers under this closed door lab test are able to look to be within the limits of this 15 degree stuff - but in match situations they could be going over the limit, when under pressure vs attacking batsmen.
When Ajmal was being hammered by Sammy in the T20 world cup a few months ago, this point was raised because Ajmal was bowler quicker balls and his action looked horribly jerky.