Dont Kill Coin

I am not looking forward to the removal of the coin line for s10. I play mostly Melee supports and I find the targon execute mechanic to be completely awful. Why should my ability to generate gold as a support in the midgame/lategame be reliant on the good graces of my midlaner/toplaner/whoever is randomly near me. Coin is a much more elegant solution that does not require specific game knowledge and constant cooperation from my teammates.

It is always "strictly correct" to allow the targon's support to execute the cannons, and yet any support main can tell you that all the time your laners or even junglers will kill them in 1 hit from above the execute threshold, or kill it before you can get to it even when you ping your intent to last-hit. Probably most of the time it is unintentional(they don't know I have targon's, or just are not paying close attention while doing random midgame waveclear), but why even have the mechanic if constantly creates this feel-bad subgame where i have to struggle against my own teammates in order to get them to play in the optimal way? I just find the mechanic so completely frustrating.

Basically the Targons mechanic creates the ability for your teammates to grief you, yet it isn't reportable, since it looks like normal gameplay. Why not just make 2 equivalent coin-lines to augment the spelltheif and targons reworks?