Lgw trips are certainly achievable for newer 777 folk. ANU and UVF have become far less desirable for many since hotel changes over the last couple of years. BGI varies. If you want PUJ then you require an act of God. CUN has been a very senior trip but it may change now with the loss of the additional credit and the 3 day rotation.
Places like SJO, BDA and LIM filter quite far down and you are welcome to that late JFK...
MCO and TPA seem to have a group of mid-seniority regulars who must have a Crickets loyalty card by now.
My biggest beef (lgw regular) is the lack of bunks. Only the really long stuff (LIM, MRU) gets an A/C with proper rest facilities. But then that’s a 777 gripe that affects LHR too.