You could try putting the price of your tickets up $1 to see if your attendance drops, if it doesn't drop then put the price up for the next match by another $1 until and so on until the crowd number drops, then drop the price by $1 and you will have reached your optimum price for your league level.

There are crowd limits set for each league level, so the 2500 is the maximum you'll get until you get promoted up to level 3.

I'm currently on level 4 and the crowd limit is 11500 (bit of a waste of a 21000 seater stadium!!) so as long as that many turn up you still get +5% possession.

If your still in the cup or CL then you should be able to charge more for those competitions (all adds to your revenue :-) $)

HTH