ffX-2 is good but its very different to ffX so i cant say whether your like it. its certainly no where near as good as ffX.

i cant remember the withered bouquet but the mars crest can be used to get a characters ultimate weapon powered up. i,m too tired right now(its 3am) but i,m sure other ppl would be kind enough to post the celestial mirror, celestial weapon side quests or at least the ones that involve the mars crest