Lucy, is T/A transactional analysis? http://changingminds.org/explanations/behaviors/ta.htm

I don't think you are supposed to literally "be" a child, it's kind of like role play? That's fine but I don't know that it's "therapy" which is what one uses to work on one's self from where they are now, as an adult. We can't "be" children again and though acting out situations that way might give us helpful insights into how we got where we are, there's nothing to "resolve" there because we don't have our whole selves?

I don't see you as running away from anything, I think role play in a situation you're "familiar" with is "easier" than sticking it out as an adult and learning to make your thoughts and wishes known in real, present time with another real person.

I don't see any "conflict" in doing the two different types of work but I also don't see any reason to just choose one over the other as if they were comparable and it was only a matter of taste. They have very different goals I think and, especially if your group T/A thing is over in September, that isn't "going" anywhere into your very real future? To me, T/A is more like a "course" one would take to understand background better and where you and others might be coming from but not too helpful if you stay in just one of the roles. Humans aren't just one thing or another, but all the roles, a "child" wouldn't be able to have this actual problem you're expressing :-) and be able to conceive of it as you do. Your adult self is very much alive and well, working to try and "balance" you and I think that is what your therapist you've been seeing for a year is doing also.