Don't worry. I believe you.ICC was not undertuned, the vast majority of guilds cleared the heroic version with at least the 5% buff active. I don't know a single player who was clearing heroic bosses without.
Was it too easy at a whopping thirty bloody percent increased health/damage/healing? This shouldn't be a surprise. The difference between SWP and ICC is that SWP never had a 30% buff (and the bosses losing health was bad enough, but it still is nothing compared to the ICC buff).
Anyway, I much preferred the story behind SWP, and the overall look of the place. It's hard to say if the bosses were more fun when there were only half as many, although Sindragosa definitely doesn't help ICC win my vote (you might say she betraaAAaAaaAAaaAAAAAys the cause).
Also I feel like the only person who hated Ulduar. Such a boring ass raid, was sick of the place two weeks after it came out. Crappy art, too.