I have noticed on my recent DUB-LHR-DUB flights that BA are getting quiet a few J pax - 5 to 10 on recent flights. Not sure if they are connecting pax or just doing the short hop.
Just fyi: For my bookings from Nov 1, I am seeing the GBP69 upgrade offer in MMB.
Yeah, CE loads haven't been awful the last few flights I've been on. Not 100%full, but hovering around the 75% mark. ET cabin has always seemed pretty well booked also.