The main reason I activated my MPO account was the lounge access for Silver individual members. I had been unhappy with the changes at AA (mainly disappearance of soft landings (from EXP) as well as experiencing an unsatisfactory customer relations incident).
I am pleased with the unwritten benefits of CX Silver (when added to existing statuses) but as my flying becomes (seriously) reduced I may just abide with the AA LTG and hope they retain the 30 day AC memberships as the CX Silver will have limited marginal benefits. But then it seems that all airlines are examining FF benefits.
Happy wandering ??
Fred