Hello Mario,
In fact I wanted just to point out some possible points to think about them. If they are non-issues, that's fine :-)
It is clear that broadcasts are used locally.
That depends on if your network is a broadcast network (like Ethernet). Thats when you need the broadcast address.
But if we don't take in account the fact that an subnet is further subneted, than there's a chance that one tries to send a packet to a network or broadcast address. I think the allocation scheme should be aware of that.
That depends: If you can change the netmask of the subnet in question to a
/23, then the routers would be fine.
In that case the discussion doesn't apply since it is just a regular /23 subnet. But you can not just define such a joined subnet without special care , because in that case the broadcast IP of the first and the network IP of the second subnet will become routable IP addresses.
Just my 2 cents...
73! Marius, YO2LOJ