How about not changing the procedures at all. The ones above work fine, and if we introduce another national procedure it makes it hard for the foreign pilots to sing to the same hymnbook.
How about changing the aerodrome approach books with a suitable phrase. This will (ahem should) be read by all pilots so the level restrictions are adhered to be all pilots, without undue fuss?
p.s. as a driver I still make the levels (if I can!)