I don't play much with the new version as I have 3 teams in 3 different browsers so I can't do it with my RAM.
I do some training in the new version and my levels are about 8.
In most of the games I play with the old one because coaching it's better for me (or I didn't get familiar with the new one where I must change the screens to see the stats).
I used the bonus in 2-3 games so far.
In that game, I started with defense/counter/flanks, oppo scored twice, I sub my ST with the low rate, switched to attack and the the last 15' minutes to hard attack + attack bonus.
Nothing
In another game, I had a better team plus the support of 6-7 friends but the ball possession was equal. I believe he used b.p. bonus. After about 30' min the b.p. went to 60-40 for me (something normal). The b.p. bonus he used, didn't help him to avoid the defeat.
Do you have any case where the bonus helped you to get the result or it's the efficiency after all ?