I think from a general perspective, you cannot compare Battrick with anything. It is pretty complete and pretty realistic although if you don't have loads of free time lying around, you may stop playing it (much like I did). I remember signing up for Cricket Manager and in my first time around it I decided I didn't want to play it. Battrick did last for a few months, though...
Also, about the transfers, the mods won't actually go around looking at every transfer. I am sure there will be some sort of script that can be run at the end of every transfer day that highlights abnormal transfers and sends a report to the relevant mod who can then sort it out. Battrick has been around for a while which means its developers have had plenty of time to not only add bells and whistles, but perfect the underlying platform.