It is rather unfortunate that some posters have resorted to trolling rather than actually discussing about the points mentioned in the OP.
So let me make it simple for you guys, let's take last 10 completed ODIs in which Imad Wasim played.
Bowling Stats(most recent first)
3/53(10 overs)
2/62(10 overs)
1/58(7 overs)
0/63(10 overs)
0/51(10 overs)
2/56(9 overs)
1/34(10 overs)
0/60(8 overs)
0/50(10 overs)
0/38(7 overs)
Wickets = 9
Average = 58.33
Economy Rate = 5.8
Strike Rate = 60.66
These are pretty ordinary stats, in fact tbh, they are very poor if you are someone who is not a part time bowler, Imad more than likely will have to bowl his quota in every game, in his last 10 ODIs, he has done that 6 times and he hasn't bowled less than 7 overs in any of these games.
If the trio of Fakhar, Hafeez and Malik bowl out these 10 overs, they are more likely going to perform better than Imad in 9 out of 10 games, in fact Mohammad Hafeez after coming back from his bowling ban, is still a better spinner than Imad.
Batting Stats(most recent first)
25(21)
12(9)
22(12)
8(4)
50*(34)
1(5)
43(53)
19*(10)
28*(13)
47*(31)
Runs = 255
Average runs per innings = 25.5
Strike Rate = 132.8
I mentioned this in the OP as well, he is there in the team based on his flashy 20s towards the end of the innings, and he simply can't be in the team based on that, these innings have never helped Pakistan win a match, at least in the last year or so. And the fact that makes it even worse it that he bats at #7, even if you promote Hassan Ali to #7, he will do the same job for Pakistan scoring some quickfire 20s and 30s and he might do that at a better SR also.
I think Pakistani selectors get the stick for no reason, bcz the majority of the cricket fans are obsessed with mediocrity and so are the sports analysts, commentators, former players, anchors and journalists, barring very few people who actually analyse things rather than blindly supporting someone. People are whining on SM and demanding Amir and Wahab to be in the WC squad, two pacers, who to me are comfortably the worst pacers in Pakistan has right now, how can someone call for Wahab's selection in the ODI team, his recent record in the longer formats is terrible and same is the case with Amir in ODIs, someone who avgs 110+ with the ball in ODIs in last 2 years.
Coming back to the topic, the major reason for the downfall of Pak cricket is that from supporters to the chief selector, no one in Pak is able to accept this that if a guy is good in format, it isn't necessary that he will be good in the other formats as well, same is the case with Imad, who to me is a must in the T20 and every team/franchise would like to have a player like him in the XI in T20s but he's isn't even decent in other formats as per the requirements of modern cricket. England learnt this thing in a hard way, after they were ousted in WC 2015 in the most embarrassing way possible, after that they went for proper players in proper formats and hence no more Broad, Anderson, Cook etc in ODIs or T20Is and so did India, after the CT17 defeat. Australia did it way before anyone else, their T20 and longer format teams look like 2 different teams.
Pakistan is probably 5 years behind in this case, and the fact that makes it worse is that it's not only the management but fans, analysts, commentators, former players, anchors and journalists, all of them are same in this regard(barring a few, like mentioned above).
In today's cricket, player like Imad won't make it to the ODI squad of any of the top teams.
Some players management have messed up in the recent past, by playing them in one format based on the performances in other format :
Yasir Shah
Hasnain
Imad
Fakhar
Imam
Amir(good for T20 stuff, mediocre apart from that)
Faheem(best T20 pacer in the world RN as per rankings, wahiyat in ODIs)