I absolutely hate forced movement/CC by allies. It's terrible in solo queue because either you get a troll that uses it to fuck you up, or you get those with Jinx voice here the best intentions who, whether they're good or bad players, fuck you up anyway because what they see and think is a good idea doesn't match what you see and think is a good idea.
I hate Bard, Kalista and Tahm Kench for that reason, and would love nothing more than to see that part of their kit removed and replaced by something healthier. Thresh's lantern should have been the closest LoL ever got to allowing you to move allies. This ain't DotA. And I can't read my allies mind, and they can't read mine.
When Kalista randomly pulls me with her ult, 75% of the time I have no idea what she wanted me to do with it (so I guess and I'm wrong half the time), 15% of the time she is obviously saving me so I thank her, and 10% of the time she just royally screwed me over even if that was not her intention (pulls me when my 2nd tick from Morgana was about to pop, pulls me when I'm channeling my Janna ult, etc). There have been very few instances where a Kalista properly ulted me for non-defensive purposes, and guess what, they were all premades with voice chat and me yelling "TOSS ME TOSS MEEEEE!", lol.
Or we can add a pop up when Kallista wants to bond you where you either click "Sure, let's do this" or "No, f*ck you". Because i'd like to click the second option.