Guardian Angel Change? What do you think?

Just had an idea about a change for ga. What if the revive part were activatable? It would have to be instant and uninterruptible by mere combat (like ghostblade as opposed to edge of night). Here's some reasons why I think it could be cool.

1. skill expression - you'd have some window of time where you would revive if you died and have to actively choose when to use it. Riot says they like it when players are allowed to show their skill as opposed to gimme stuff.
2. Suppose you blow someone up in a fight. If timed properly, silences, suppresses and whatnot could prevent them using ga for that fight - making use of cc more strategic in teamfights and duels.
3. Suppose you are caught out in a fight where you know you will lose and you have no hope of escaping from. It's really frustrating to waste ga in such a scenario. Instead, you could choose not to activate it so that you would instead have it when you respawn for the next crucial fight.

When thinking about those scenarios and reasons, it shows there would be both benefits and drawbacks to ga so it could help either team - the one with the ga user and the one fighting against the ga user depending on the scenario. I think it is something at least worth investigating on pbe. What does everyone on boards think? Upvote if you want Riot to test this idea.