How do you plan abiding to the maximum of 5000€ overseas transactions AND permit bitcoin withdrawals? Won't someone be able to deposit 100000€ and then send the bitcoins wherever he wants? More generally, how will the goverment be okay with you offering such a simple entry-point for bitcoin's pseudo-anonymous features?

The fact that most people won't do bitcoin direct transactions, since they aren't tech-savvy enough, is certainly true but isn't a solution to the problem IMHO - the goverment won't like for this loophole to be there.