The Medic is the only Hero, which most time Cannot effectivly interact in fights or better to say, cannot Kill anything. Shes still a very Important Member of the Team, but lack on Offensive Abillitys. So you might get a bit Bored if you lost all your other Stuff and just got the Medic.
However it's quite hard to give her some usefull but not Imbalanced Abillity. It's also hard to implement since I dont want you to control anything else then your Units. So im realy limited in Stuff. We all know Samantha is a Smart Girl with a lot of persuasive power. She's the only one able to control Bob. So she also might be able to Cure Infested Terrans if she just come close enough
However, this still might significantly change the Gameplay at least of some levels. So if you Vote please think real about it and write a Post what you Vote and why you do it and what u expect it to change and how you think the Changes/affected levels could be (re)Balanced. I'll count good Posts much higher then a normal Vote.