I don't know anyone silly enough at JQ to go to QF for an SO slot even it it did pay more money.
The top 120 guys on the seniority list are flying widebodies or are very senior on the A320.
This means they are based where they want to be, flying what they want to fly, bidding for the leave that they feel is appropriate to them.
These guys are mostly older now. They don't want to sit up the back watching a couple of geriatrics talking about how unfair the world is.
PS the 787s were not offered under the MOU because the Q numbers are now very junior. The most the seniority will get is an Adelaide A320 command. Melbourne and Sydney are overcrewed and it'll be some years before Q numbers have the seniority to go there.
If you bid under the MOU for JQ Adelaide, expect a couple of years at least there.
PSS most of the Qantas MOU pilots have QR'd. Mustn't be too bad in the evil empire.