Supply Amount above head and mesmers
It is not likely to be fixed as this is the same issue that comes with only the real mesmer having certain boons at times or signet/mantra icons and also the icon overhead in downed state which also points out the real mesmer. ANet prefers to ignore that mechanic.
Putting it next to the party bar or character avatar is a good idea. I don’t need to see my party members supply count in this game mode. Only they do. if its meant for enemies to be able to see as well (working as intended) then I would hope they put it over the clones as well.
Willing to pay for boxed expansion if you put legit GvG in the box $$