Amanek already player star role , some years ago , and he was always dropping 30 frags per map, so don´t know what you saying.
Zywoo is also a huge improve over niko as an awper, and you are not suggesting to kick him? why? because of 1 tap highlights?
Amanek can adapt to any role , niko can´t. If he plays entry for more then 1 week , is performances will start to deteorate , already seen it multiple times. If he plays primary awper , he is far bellow other in terms of repositioning , knowing the best angles , how to adjust to the setups fast, etc.