PE is basically significantly more comfortable seating and some privacy on a Y service with a quick bit of make up. i personally find it a totally unappealing proposition and never book it except if it’s with a view to upgrade it, but as it happens, it is probably the single most commercially successful and profitable cabin in the BA network. People do not only buy all of it but they buy all of it at fares that work well for BA. As long as the customers do this there is no incentive for the airline to do any of what you hope.