1.) i am ignorring the stamina pretty succesfull, till the ASD i play with a bunch of players with stamina 3 and i don't like slower tactics, sometimes i brwak down in the last quarter but i won't say that it happens to me more often then for my opponent so i think everything is ok :)
2.) maybe when he looses quarter 2 nad 4 more often, but as i said you could copete there also with low stamina