You'll only get the forced crit/finishers and Wave Hand in Cloud (yay!) to rank 3 beyond DAH/EC, but that's close to 50, others will cap at 1 or 2 ranks (sadly, just about every non-damage upgrade is pretty unnoticable - at least Harm debuff duration got extended so it felt like getting an upgrade.)
This isn't particularly unique to the Harmonious style (but since you're gaining the abilities en masse instead of leveling up, it feels wierd - granted) as at least Dragon works pretty much the same.