Are 11 outlets on a 15 amp breaker too many?
probably not, but there are a few other things wrong too.   

Pretty sure that the bathroom outlet needs to be a 20amp (with 12 gauge wire) on a separate dedicated circuit.  think about this if you plugged in a 1800 Watt hairdryer you are maxxing the line and then you still have 10 other devices :) 
Also, the circuit from the bathroom should not lead outside i think with the exception directly to another bathroom outlet.

Whoever wired it up clearly missed a few points there and probably more - 

ideally you want your circuit to serve a purpose whether it is lighting, or a room or some critical service.