I think it would be really cool if you could give one of your restoration/medical kits to another player on your team. For example, if your teammate is desperately low on health, there are no medics around, and he doesn't have a Medical Kit, you could help him out by giving him one of yours. Or just do it for him.
That actually sounds like a good idea. Well, I suppose there's the problem of spreading equipment that just isn't accounted for in balancing, but then, is it really that much of a difference if you have a medic with C4 or a heavy with Kits as long as no one dies? ... Good question, I don't know that either. Still, +1 for the concept. Now we just need Res-Kits.
They should make Restoration Kits Heal over Time like a Buff that lasts 40-60 seconds , so you have high regeneration. Pointless having the Restoration Kit as it is, when the Med kit that costs the same resources but doesn't light you up like a light bulb.. Med Kits should have a secondary fire mode on it anyway, to heal others.. but I guess that would make the medic class redundant..