I don't think that Randle is a low IQ player, but I do agree that he's not a great fit with his current skill set. That said, he's still young and you would be betting on him improving his perimeter game. Personally, that's a bet I wouldn't make, especially if it required a long term commitment on our part. I know your in love with Gordon, but I look at Gordon as a more athletic version of Randle. Randle scores most of his points in the paint, and so does Gordon. But Randle is more efficient at it.
Gordon shoots 72.5% from 3 feet or less while Randle shoots 74.2% from that distance. As you can see, both are very efficient from there. The strange one is that Gordon only shoots 30.9% between 3 and 10 feet, a distance you'd think he would be deadly, while Randle shoots 38.3% from there. Both players are similar from 10 feet to the three pt line, Gordon shooting 37.3% and Randle shooting 37.0%.
The main difference between the two players other than physical characteristics is that Gordon pumps out around 5 three pt attempts a game. And as I pointed out in an earlier post, although he's shooting 34.6% on the year from there, he's shooting under 30% from there in his last 20 games and has a career average of 30.8%. Both players usage rate is similar, but Gordon's ORtg is 106 against Randles rating of 110, and Gordon's DRtg is 110 against Randles rating of 107.
I doubt that Randle will ever be a consistent 3 pt shooter, and he seems to have little desire in that area since he doesn't even take one attempt a game. So the defining factor for me with Gordon, is will he ever be a consistent 3 pt shooter. Right now, if you go simply on per 36 numbers, Randle scores more pt's, and grabs more rebounds. He has a better offensive rating and a better defensive rating, and with all that, I don't think he's a good fit for the team. For those same reasons, I don't think Gordon is a good fit either.
To some degree I think both players would help the team, but the lack of fit might hurt the team long term.