BN TAC position… good or bad?

Any time you can get a position with direct access to a leader much more senior to you, it is a good thing.

You will have access to some of the inner workings of the BN, which will pay HUGE dividends when you do take Command. You will have a Senior leader who, if you impress, will be able to "talk you up" to other senior leaders and start to build your leadership network and your resume. And you will be able to build your peer / near-peer network as your position will bring you in contact with a much wider range of LTs and CPTs.

It is a great position for a career-minded LT.

It can be good and bad but the main focus should be how can your learn from this position. What take always can you use in your next role that will continue your growth as a leader. At some point you will be an aide to some commander at some level this is one thing that cannot be avoided IMO.

At about your career point, I was assigned additional duty as the Squadron Admin Officer. I thought my career took a death blow. Sounded like a very boring job. No place for a pilot with aspirations toward moving up. Turned out it was one of the best jobs ever. I worked directly for the Squadron Commander (O-5). He was a very good leader. He knew the Air Force very well and mentored me in a number of areas that helped me later in my career. I had the "opportunity" to learn to work with SNCO (first sergeant), junior NCOs and enlisted. Something Air Force pilots don't get much of until they are commanders. I did "chapter" investigations as we processed airmen out of the Air Force for various infractions and problems. I reviewed NCOERs, OERs, award recommendations, presentations, etc., and learned a lot about how to write well. The Commander had a secretary who kept his calendar, so I didn't have to do that. But she was the first Air Force Civilian employee I ever met or worked with. I worked with supply, finance, personnel, JAG, contracting, and Wing admin. Parts of the Air Force I only sort of knew existed before then. The job lasted only about 9 months then I transferred to a new Squadron. It was a good opportunity to get to know the Air Force outside of the operational environment. If the TAC job is similar to my experience, then it may be a good deal.