It's probably sad that I can think of plenty other things wrong with the relationship not mentioned in that summary. BTW, why did T/K have a better chance at lasting than T/Y, again?
And a quick question: Does this sound like ship-pushing? It's not meant to be, and from a sane perspective it shouldn't be, but I'm asking because that's the sort of thing Sakura or Syaoran would say in an E/T to hit the readers over the head with how obviously similar and suited Eriol and Tomoyo are.