Well, it was obvious that this is not an attack and blast oriented character, though resonance veil/spike negates that. I would be a lot more concerned about the other things attack affects. Can't crack a file, can't remove a mark, can't wipe your resonance trace, jam a signal. Some of those might come in handy.
As long as you are sure you will never ever under any possible run setting need to do any of those things, you are right. Charisma of 1 not a problem. If you admit it is possible that you might need to do them, then it could be a problem. In a concept as focused as completely on the matrix as a technomancer, I would consider it a point of concern.
Is it a concern for you, or a concern in the game you play the character in, too many variables to guess on. Looks like a fun idea, I definitely like it.