Then, in all seriousness, your opponents aren't that good. The players I play against will, given the setup you suggested, do exactly what martyn suggested, as well as running recievers further downfield. You'd be left both decent field position and the distinct possibility (roughly 1 in 3 if he's got block, 1 in 2 if he hasn't) that the Ratogre will force you to miss your entire next turn.The opponents I usually meet don't play so that they have to count on a turnover in order to win. Instead they block your LOS down and run deep i turn 1 creating a sort of wall of players and tackle zones around their ball carrier.
Now, if you set up like that every drive, it's going to happen to you. If your opponent was coaching Orcs, Dwarves, Chaos, Undead, or something else suitably bashy, they've just had 2 turns back to back. They have every possibility of getting every last skaven on your team on the ground &/or off the pitch. Even if they didn't then they'd have a guaranteed touchdown if they wanted to take it. Personally, against skaven I'd be saying don't bother scoring quickly, use your free turn to set up your players however you like and smack the warpstone out of every last rat in sight.
Frankly, I think you've been lucky not to lose every game.