sounds like you are having fun... 👍
i think someone mentioned earlier that piano is also hard to mike, that and overall recording/mix quality is really important in how sound is then portrayed in room by a well set up system, i think that is what your experience thus far is highlighting (not to mention the challenges this poses to a system to handle transients, the full range of frequencies, overhang of notes etc)
i look at a piano, how big the enclosure is, say a grand with its lid open, the nature of direct, reflected, resonant sound, quite a complex set of sound waves emanating...