Give Elise's Rappel a reset on kill/assist

Lots of threads are being posted on Elise lately and C9's Meteos himself recently stated that the problem with Elise building damage is that even if she gets her kill, she has no way to get out safely after because she lacks a good way to survive, and has no good escape. It is for that reason he believes she is not viable.

In this way she is similar to Talon, and the only reason Talon is viable as an assassin (some people might say he's not viable but he's not Elise tier at least) with no escape is having so much instant burst that there's basically no actual chance of not getting a kill. There's a huge risk that he'll trade a kill for a kill, which isn't good as is, but there's still a very small chance that he'll go in, guarantee his death death and not get anything for it. Problem with Elise is that if you want her to build damage, she too has to accept that even if she succeeds (gets a kill), she'll die right after it (a failure state).

So what's the solution? Pretty obviously, exactly what I put in the title. Make it so that when Elise gets a kill or assist, the cooldown on Rappel is reset so she can jump up for a couple of seconds of safety, and possibly jump down onto the front line (or a nearby minion) to escape, OR if she's really greedy, onto another high priority target to try and get another kill (yay for more choices and risks, etc). That way you give Elise a justified reason to risk death - she MIGHT get a kill, and if she does she'll probably survive. But if she fails to get her kill? She loses, as an assassin should.

tl;dr Elise has no reason to build damage because even if she bursts someone she'll die right after. Give her a reset on Rappel and the risk of trying to get a kill will finally be acceptable. Also, being able to use Rappel twice per team fight would just be really cool. Thoughts?