I disagree with this - we much prefer the PE experience on the airbus planes, despite the fact the PE cabin isn't in the bubble
The PE cabin on the airbus planes is not dissimilar to the atmosphere in the bubble - you get your own crew and the cabin is very quiet, spacious and peaceful. The new leather seats and cushion foot-rests are much more comfortable than the old tatty fabric seats found on the LGW fleet.
You can't compare the downstairs PE on LGW planes with the PE on the LHR planes, since the latter is very different not only in ambience and style but the fact it has dedicated cabin crew, too.