I am a CX silver for my primary OW airline usually flying SFO-HKG. These next few months I will have to extend my trips to other US cities, DFW. Could anyone with experience as elite in both programs help?

When flying on AA it looks like I can get bag fees waived, however is there access to preferred seating with my CX number on itinerary? I also have existing 500 mile upgrades on AA. If I could re-earn AA status, is there a way to use upgrade instruments as an AA gold BUT allocate those flight miles to CX.

Thanks for any help.