How I would envision a support-role Doctor... to have the possibility of not using a weapon and still be an effective healer and team member.
Doctor's with new nanos and a possible nano deck to allow (the option) for Doctor's to play a more supportive (and less offensive) roll.
This would mean:
1) New scalable nukes based off of MC.
2) A possible Nanodeck that provides the doctor more nano skills and defense.
3) A nano, or perk that let's us remove snares and roots.
4) A nano or perkline, that allows for serious nano regeneration. (like a humidity)
5) Some other form of nano (besides UBT) that could be considered crowd control. This could be a snare, root, stun, or blind.
6) More NR options. Perks, armor, etc.