So I found out one of the main character is just a dream which i'm so fucking bummed about since that's a fucking awesome plot twist.

So with that in mind is it still worth it to playthrough?

I had it spoiled for me and I still loved it. Then again I can still enjoy a movie/game/show even if I already have been spoiled about its plot.

It's not worth playing even without spoilers.  There's a couple hundred JRPGs you could play and have a better time with than Final Fantasy 10.  Final Fantasy 10-2 on the other hand, that's worth playing.  The story is garbage, just like Final Fantasy 10s, but the battle system and other sections of gameplay more than make up for any shortcomings the game has.

Wow, really? A lot of people said it was one of the best games of the generation.

Why am I not surprised you were one of the 1st to reply =P

Anyway I personally say go for it... but Im a biased fanboy so what do I know.

Yes! The game is amazing! The best FF and one of the best JRPGs ever. The haters just got too close to Sin's toxin v.v don't listen to them, they don't know what they're talking about.

Don't believe him ...

There's a reason why people couldn't stand FF X-2 ... 

To answer your question, yes it is still well worth playing even after been spoiled ...

You must consider that the game is pretty linear and doesn't have a traditional world map (or a proper airship) like the older games

Edit: the battle system is cool, pretty fast-paced for a turn-based game and you can switch characters on the fly

LMAO ... (I have no shame in thinking it's a funny joke.)

I think you just further spoiled plot for OP ...

Eh, happens early in the game, he'll live