So you think the world should change to flying in metres BBB? I think human brains seem to like tens and zeros, and 1000' seems to be about right from both a simple and a safety perspective. I'd vote to stick with feet.
As for QNH being replaced with altimeter I'd vote for QNH, and not just because I'm getting long in the tooth! IMHO, QNH sounds the same when spoken by any English speaking nationality but the same cannot be said for altimeter. Altimeter also has more silly bulls, particularly if you pronounce the decimal point; with the added possible confusion that some nationalities refuse to use the correct ICAO for decimal.
I agree that long held conventions should be looked at every now and then to see if they can be improved but these two aren't broke so probably don't need fixing.