Bulkhead Seat
 

Has anyone ever been compensated for getting reassigned of a bulkhead seat in Economy Class on CX?

Did you pay seat assignment fee? If yes Refund Law...

Theoretically, only if you paid for extra legroom seats but being moved due to disruption, missed connection etc. but not if you "do not satisfy safety requirements".
Normal bulkhead, why would you?

The agent on the phone assigned the bulkhead seats in the middle section of the 777. They warned me since they are bassinet seats - I could possibly be reassigned to somewhere else.

Seats are not guaranteed, if you paid for seat assignment you are eligible for a full refund of that payment. Since the agent did warn you that bassinet seats are subject to relocation, CX has done it's job there. Best they will do is give you another bulkhead seat if there are any left that do not need payment.

CX assigned them without you requesting for these seat? Either way, I don't see how any compensation would be due, unless as others state, you paid for the nominal fee for a seat assignment.

I thought CX stopped unblocking bassinet seats (at least for GO and SL). Was this policy reversed?

I called the reservations dept and it was given to me without any questions asked.