Tahm Kench Interactions Idea

So... Tahm can qe minions and monsters and that is awesome, but when it comes to champions with 3 stacks he can't. Because of how strong a CC chain that would be I understand why he can't do it, but it would be so situational that he could pull it off that I think it might be worth adding. Additionally, this would up his reward for how much risk he puts himself in to get those 3 stacks. He is easily kited by a little mobility or CC (Vayne, Lucian, Corki, Ashe, Cait, (and that's just when he supports)). If he gets the 3rd stack and he needs to w but they dash away, he should have a chance to pull them back. With the right teams I could see this being strong, but not really too overbearing, and if it does turn out to be, his q hitbox could be reduced or something. This is all just an idea though. I like the idea that if an enemy Kha goes in on my carry and I get 3 stacks but he ults out, that I still have a chance to get him with the qe. Same with Vayne or Lucian dashes or Zed or any other mobile champ. It might even up the reward enough for Tahm to see a significant rise in gameplay in ranked games, where he currently doesn't have that high a pick-rate or win-rate. When I play him he doesn't feel weak, he just feels slow and unable to do his thing a lot of the times. Small changes like this could prove very beneficial in fixing that issue (Plus I really wanna tongue lasso people). Any thoughts?

EDIT: If anyone else has an idea on how to make Tahm more appealing to people without breaking him (that was my goal with this), then feel free to share. I love playing Tahm and I just wanna see more people enjoy him like I do.