this sounds highly unlikely? or highly idiotic.
It is AS so it is 50/50.
If every flight has no COS bonus, then this is probably the most harmful change in any program, for both AS and its flyers.

• You are discouraged to buy premium tickets on AS, and when given the choice, many would book on partner than AS/HA because let's be honest, for SEA-NRT, HA A330 ain't never catching up to JL, and SEA-LHR-ATH many would prefer the new BA suites over the HA suites, especially having 1 single carrier is significantly better.
• And if your LAX-HND is on JL J, why would you ever credit to AS for the lowest 100% while you can put on AA for at least 125%?
• Also if you are flying HA 787 SEA-ICN J, you literally get more miles on any other program than AS. what??? who came up with that?

I think it is very unlikely because just 10 seconds of thinking would mean it ruins the program. Because if you have no COS bonus, this devalues the revenue stance folks too since AS will not know the fare details of partners. For a long haul flight like BA J SEA-LHR for 2000GBP, if you choose segment based, you get 500 points; if you choose distance, you get 4800 points; if you choose revenue, you get 4800 points as well since AS does not know how much you paid; if you choose almost any other program, you get 6000 EQM; if you choose BA, you get 2400TP. AS would almost never be the choice for premium passengers. I refuse to believe they are bad enough to introduce this change.