All weapon system evolve. If they were not evolving they will die of technology starvation. The Barak 1 has evolved to Barak 8 and same is true about famous Stinger Missiles. Hence Akash first edition is all right, the newer versions will be better, as long as technology and science behind is well understood.
No guys, Akash did not fail. It succeeded 3 out of 4 times.
Remember the Patriot missiles which were sent to defend Israel in 2002 during US Iraq invasion. Half of them failed to operate as these were assembled in Israel. At that time finely floating particulate matter in dry and arid Israel was to be blamed. The point here it did not operate well.
The recently used Israel's Iron Dome missile system to shoot incoming shells works 50% of the time. That means that half the missiles fired at it did not catch the incoming shell, although Israel will make you believe their success rate was 80%. Reasons - they are also selling it also, hence wish to put up the best face. Again the point here is that the best missile systems also fail.
My point here is to naysayers; It is Indian, it is successful and it is deployed to shoot planes and missiles. It will catch the incoming hostile jets and missiles 75% of the time.
Hence, be proud; you have done what only a few world over know how to do.