I saw Aqib in 1992 WC the first time lol. I am not that young. He was never a good test bowler. averaged in 34-35 in test. ODIs was a different story and he was used by the planners as a "opener remover" with his outswing with new bowl. Aqib did not have the wicket attacking capability that is required for tests.
Nothing can change the fact that Aqib failed in tests just like nothing can change the fact that Abbas is bit downgraded version of Asif, averages 22 and if was given chances at right age instead of relying upon Imran Khan Jnr, Rahat Ali, Irfan, he could easily be the fourth Pakistani pacer to reach 200 test wickets at 21-23 like average. But we decided to rely upon any circus performer in PSL and Naseem, Musa, Dhani happened.
You are making too many overlapping points so let me be a little concise.
Abbas bowls with a horrible attack and a very mediocre captain. This is true.
Abbas is a downgrade on asif this is true. It’s a fact that he is many levels a downgrade just not a little bit of a downgrade.
Abbas has no ready replacement so his place is pretty much assured (like a younger hafeez)
As far as skills and prerequisites of a L&L bowler abbas doesn’t have a) the ability to move the ball away from rhb, ability to get bounce, be a threat after 10 overs etc etc. He has a low average after 23 tests but I’m sure Sami had a pretty good average after the first few tests. But average is irrelevant here. He’s playing against a bad team.