Personal taste is personal taste... it's not really something you can argue with. But I don't get the impression that your feelings on the line-up are widely shared, or at least not on here. Last year there was a general agreement that the top rank of the line-up was a bit underwhelming, but this year lots of people (me definitely included) are pretty excited about it. My guess is that it will sell-out pretty early again but it's certainly pretty expensive... it's only worth going if you're feeling it.
Practicalities, changed economic situation, and the fact that Starmer and Reeves have been heavily courting business. It's now more of a start than a fait accompli. Same with the Green New Deal plans. I would hope (although won't hold my breath) that some of the stuff might come through later.