potential for upgrade at LHR
lounges and airport at LHR - part of my trip. I try for at least 4 or 5 hours at the airport, so LCY would be a tad disappointing

I had thought about going LCY for a while just to see how it is on the small craft. But now with the TP differential gone, if I want 'private jet feel buzz' (emphasis on the feel - that's the closet I will get to it, unless I'm lucky on the Lotto), then I take the AA transcon on the A321T.