support gem idea "skill variation"

I have an idea for a type of support gem:
There are many skills that could have an interesting skill variant.
E.g. rapid assault would fit better into elemental huntress builds, if it would burn instead of bleed.
Now one could add another similiar skill to the game, but that would quickly bloat the game with similiar skills.
One could also add a support gem that lets a skill burn instead of bleed. However then one would also have to consider all the other skills that could be transformed this way.
Instead my idea is to add a special support gem to the game - the only support gem that functions differently with each skill gem: it will always create a skill variant particular to that skill. All kinds of cool skill variations or just adaptions of skills to fit certain builds better could be implemented this way.