Possible solution to Drain/Sustain tanks

I dont think its a secret that Riot has had quite a bit of trouble trying to balance drain/sustain tanks. I thiink we've all seen the ups and downs of champs like etc. There's one thing that always struck me as an obvious road block to getting these champs balanced. Which leads me to my suggestion:

Remove Grievous Wounds

NOW WAIT. Let me explain.

You now have to re-balance them around the fact that grievous wounds is gone. Which means drain/sustain tanks are going to have to take a hit to their self healing.

It seems to me that these champs always have to be balanced around the fact that grievous wounds exists. This leads to a problem. If you balance them under the assumption that they have grievous wounds applied to them, they are oppressive when it isn't. On the flip side, if you balance them under the assumption that grievous wounds is not applied, they seem weak when it is. Even if you balance them somewhere in the middle, they're still going to be tilted toward one side or the other with and without GW applied.

Another point I would like to make is that GW should be removed for clarity issues. GW as it is is a very 'unseen' power. One second Vlad is popping 1k+ heals and the next he's manageable. Removing GW will make these champions much more stable and adds much more clarity for playing against them. There's no longer an unseen GW variable to factor in.

The presence of these champs alone also forces people to pick up certain items to deal with them. Let's be honest, is not optimal for a lot of mid laners. Although I do like the idea of adjusting your build for the situation you are in, I don't feel having one option for AP and one for AD fits that concept. Thats more like being locked into an item instead of having to consider your best option.

tl;dr Grevious Wounds should be removed for clarity issues, BUT drain/sustain tanks have to be re-balanced around the fact that its gone