I just got a schedule change for my MSP-AMS round-trip for summer (June out, August return) and I got automatically moved from 10J to 12J. When I clicked to get 10J back, I got a message saying 10J is not Economy Comfort, and that if I continued with my switch to 10J, then any amount I might have paid for EC would be refunded.
10A/B/H/J are all grey-colored (like regular seats - - not even Premium blue). This is true on my outbound as well.
