Does full conscious awareness I can connect to and channel still exist for people in deep coma considered to be in a vegetative state?

Yes, this is 100% true. You can talk to such people and have conversations with them and facilitate conversations with loved ones. So this will be yet another future contribution of yours in bringing this awareness forward. To be sure, it has its unpleasant aspects, as the dilemma remains that the person is trapped in an impossible situation, but this may, in fact, lead to greater understanding and awareness of the blessing of helping such individuals complete their transition and to prepare them first with emotional support, healing, and protection so they can make a safe passage.