Club Europe is awful......but it can be a relatively inexpensive means of picking up TP's or SC's. <SNIP>
BA Club Europe compares poorly against QF/VA domestic J. And having flown BA, AF, AY, OS, A3 "J" in the last two years, they compare poorly there as well, despite being largely similar with the seat arrangement of Y seats and centre seat blocked. The food and service on the others above were actually very good, as we one or two of the BA flights, but they were the minority. I was surprised how good the service and food was on AF, and AY is very consistent. A3 was also very good for food and service, but they fly in to T1 at CDG which is just the weirdest setup I have yet faced. A bit like a cross between Starship Enterprise and Hogwarts, with tunnels and escalators across a round void. But this is of course OT.
I have used BA/AY where I can to maximise Pts/SC earn as you mention. The last flight with them in June was LHR-BUD, from T3 (which I found better than my BA flights out of T5), where the moveable divider was about Row 8. And the enlarged J was very full, and luckily we were in Row 3 so were served while there was still some humour in the FAs. Suffice it to say that by about Row 5 the FAs had lost their sense of humour, and were rushing to finish service. But then, with 30 minutes to go, all of a sudden good humour broke out again, and wine was proffered freely for topups etc. Real Jekyll and Hyde. Still, the food was OK, and the flight very comfortable.
One of the biggest delineators for J in the EU, is whether the airline sells by the "leg", as per say QFd, or where returns tickets are far more economic as per QFi. I found myself buying open jaw itineraries with BA, OS and AF to get around the "penalty" fares for a single leg, but A3/AB offer economic "single" fares. When you are flitting around Europe on holidays, the airlines that don't penalise for single leg fares are high on my list, regardless of Pts/SC.