I don’t think this should be added to FFA. I really like the way how it is now. I think if you add this if would only cause people to complain about it. But the disadvantage and the real reason why I don’t want this is because for example; Imagine if we were fighting against eachother, after some time we are both at 3 hp and
@Siftenly comes in and cleans one of us. Neither of us would stand a chance against him anymore. Gaining full health on a kill is just too op imo.
I agree with the quote above, but I've had an issue where as soon as I'm done fighting, or if I'm in a really deadly/risky fight with one or more players, I tend to try to pull out, while making sure the other players wont chase me down in order to mutually benefit us both not risking death. Unfortunately, this leaves us both vulnerable to almost anybody. This is one of the great advantages of the kits that possess speed (2), and one of the most annoying parts of this game. Sure, it's annoying when someone is constantly running away when they're low, but if you're skilled enough, most of the time you can catch back up, provided they don't have the speed advantage.
Anyways, I'm getting a little off-topic here. While I don't agree that each kill should give you full health, I think you should get some form of instant-heal depending on either: 1. How much damage you dealt to the dead warrior, or 2. If you got the final/killing blow.
This will allow the players who deserve it the most to get both kill credit and a bonus heal rather than having people stealing kills and instantly healing to max health.
One other concern I have for this suggestion that has not been brought up yet is how players who "main" (often/only play as) the Wizard kit might be thought of as "unneeded" in some cases because one of it's big advantages is instantaneous healing by using potions that are exclusive to this kit. It might become far less used, and may even be thought of as a kit people may use only for a challenge or even as a joke.
PS. your suggestion greatly lacks description, context, and any reasoning.