Ohhhhh, that makes me so sad to hear! I guess I understand to some extent--they probably do need to expand the lounge. But FTS was unique in that it was within the price range of people for whom any of the other signature suites were off limits due to the cost.
I'm glad I was able to stay there and enjoy what was a thoroughly wonderful experience without having to expend what it would have cost to stay in one of the larger Signature Suites.
Edited to add: that still doesn't let Disney off the hook for the late cancellation of the OP's honeymoon reservation with no offer of proper compensation. They didn't even let the OP know that the suite was being eliminated! This also could not have been a sudden decision, making the late notification to OP an especially disgraceful move.