There is also problem with 1% quality players, it's not clear what does it mean. For example on my level 335q is 100%, but 1% is 310q and below that, so 1% is 290q (<310q) - it should be -80%. I can see a big problem with that.
VICTORIA CONCORDIA CRESCIT
Which problem?
I have seen also 0 (zero) star players in associations, usually from -60% avg quality and beyond that
CUP LEVEL 12 SPECIALIST (winner: Season 8 level 8, Season 11 level 11, Season 12 level 11; finalist: Season 13 Level 12)