I have two issues. 1: the downfall timeline, and 2: the placement of fs. I can believe tmc before oot, mainly due to oot having a civil war prior to the game. A civil war would imply in-fighting within a formerly unified nation, ie. Tmc Hyrule. But fs is a DIRECT prequel to fsa. The fact that when you click on the sword in the beginning of fsa and it states "you know what will happen if you draw this sword" states that Link has had prior experience with it. As for fsa, i think it is fine where it is, just put fs before it.
And then there's the failure timeline, which would do BEAUTIFULLY after fsa. It makes only sense. Geography, history, inventory, all leads well into the Imprisoning war and later alttp... Nintendo missed a golden opportunity, so to speak.