dear Tokyoite
no idea why you post here this long list...those are normal schedule changes (given the fleet with too many different aircraft types in comparison with the small fleet and the ongoing severe Problems with the 787 aircrafts…) and not the mentioned last minute aircraft swap

TG has improved a lot regarding last minute unforeseen aircraft swaps. For my last 50 flights I recall only one case (77w to 747) and this was announced around 3 weeks in advance and I got a F seat automatically for my J ticket...