Dear Qantas,
If you expand your code sharing agreements, please look to ensure that when I book I can then select my seats online as normal. Please make sure Qantas systems 'talk' to the other airlines systems.
Don't make me have to ring a call centre who then give a message that they too can only select Aisle or Window but to "not worry as a WP I'll be assured a good seat". But then only to find I'm up the back somewhere next to the toilet. I also like to look for better seats as they become available. I also like to ensure the aircraft type hasn't changed at the last minute.
To me seat selection is important. I fly Qantas when Qantas fly end-to-end (or the majority of the route). Where Qantas doesn't I now use an airline that does. Failing that, I fall back to Qantas.
Personally, I hate code share. Typically I often find my WP benefits don't seem to carry across or don't carry the full "value" with the other airline.
So I have no issue with code sharing. Just make it transparent to me. Make it look like Qantas. Make it look like what I'm used to using. Don't make me have to learn something else when I just want to get somewhere.
May be I've just been unlucky.