Amir has not been that good, no doubt, but what choice we have? - If we had 2/3 bowlers better than Amir, we would have replaced him already...But time is running out for Amir as well, this year will be one way or the other, decide his Fate, county season might fixes his issues and help him gain fitness...
Amir took two years back in 2009/2010 to reach the level he was in English summer, 5 years break looks literary 5 years break, he lost some of the potent aspect of him swing bowling, it will take 2 years again to reach that level, we thought he could come in and back to the best in 6 months, well that did not happen unfortunately...Still County cricket is the best way to get back to the top, all Pakistan bowlers learned swing in County circuit, including Imran, Wasim, Shoiab, Waqar etc...This county season is vital for Amir's revival... Keep in mind swinging ball at high pace is really hard skill in Cricket, in last 30 years I can think of Marshall, Wasim, Styen are the only ones who master that skills and all of them were/are ATG, how many others could swing with control at 140 clicks? - Everything has to be perfect for that to achieve consistently over period of time.
Its not easy to throw Amir away for Pakistan, very difficult for us, because we don't have much in the pipeline, middle age medium pacers with no control or skill are not the answers to anything... Its like replacing Babar with Hafeez, after he hit bad form, that does not take you anywhere...
What helps with young new bowler is no burden of responsibility, allow them to experiment and evolve, we are seeing that with Hasan, he is experimenting more than others and developing better...One of thing that has not helped Amir in second coming is lack of experimentation, he is just bowling same ball(same length, same line) over and over again, he is trying to get his rhythm back, which has not worked...Although he has been economical, but not impactful, people can see him off, he need to be less predictable, he got to let himself loose, this defensive mindset is not working for him...He need to try more lengths and work on old ball too, he can bowl yorker but rarely we see that from him...