AurealiusB
1) Demo playing - is like playing your pre recorded MP3 song - that is essentially what BIAB is doing

2) to play chord sheet, BIAB has to load that style. There is no way "around" that. Period.

Technically, it could render or ghost load style in the background, but that would take a lot of time + extra steps and be limited to only a segment of composition. Imagine having 120 bar tune, but you want to audition last 5 bars. It would be impossible.

The only 2 things that need "fixing" concerning playing chord sheet in my humble view, is to:
A) explain in manual what exactly play chord sheet means to avoid confusion.
B) Have a solid Undo history function, so you can revert to whatever style you had initially.

Current method is a power feature, I would hate if PGM would dumb it down or make it more complex inviting extra steps. If you are not ready for it, use premade demos to audition.