Yeah, about the speed absolutely, only testing you get the feel and I trust your judgment. Definitely feels tactical at the moment.
One more suggestion:
A nice control feature from classic PES that you could implement to great effect here is - tap dribble modifier right after a pass and the player that made the pass makes a run fwd into space. Again this ads absolutely no complexity for the novice player, but ads depth to the game allowing to setup one-twos or even to make dummy runs (i.e. make the passer run and then as the opponent tracks that run then you pass to the other side instead)
About lack of interest:
Its tricky, the market is just so overcrowded with small indie games (and big ones as well!). I guess you may have to play around with the core presentation and the core focus of the game at some point. Maybe make it a clear five a side street football feel? (instead of the grass)
The World Cup stats progression just doesn't feel that great to me at the moment. Not very interesting i guess. I see this more as a game where each team could have their own fixed identity (even if it is unrealistic) like one team have great speed but poor shot power etc. That would be very innovative because tipicall football games focus on player individuality, you could focus on team individuality instead. Something along those line. Then really stylize the art in an original way so that it really stands out in the crowd and doesn't look just like another flash game (which I'm sorry to say it does a bit now =)
Anyway, I have infinite ideas that I can bounce your way about this later =)