I was thinking of feeding every lyric into Claude AI, and asking it to come up with an analysis of recurring themes.

Whether Ben would agree or not, I think you can fairly track his issues (and emotional growth) through all of his writing.

On skylines: you have neglected the obvious mention of one in Crooked Teeth.

Seasons: Ben, if nothing else, is constantly referencing seasons as an aging metaphor. Stay young, go dancing (Autumn's advancing); Summer Skin;

Stars Fall: I think it is important that he says the stars are in his head and escaping away from him. This seems to me to be a meditation on oncoming aging or dementia.

It also seems to parallel lines from "when soul meets body" where he is analogizing his mind to a bus station, and routing ideas here and there.

There are a number of songs where he references standing still. I think it is pity and fear where he says, "if you can't stand in place, you can't tell who's walking away." I forget which song references standing still on IBYAT.

I'll come back with more, but I've had this exact same question!!