Mentioning the Dragonlance adventures in the same sentence as Forest Oracle isn't a compliment ... most of that series is a horrible railroad.
Mind you, Dragons of Despair can be run extremely successfully. It's trying something new, has one of the most amazing maps/dungeons in Xak Tsaroth, and the 'forcing' of characters to Xak Tsaroth is actually done so that players have a choice of how to get there; you can actually do a lot with the module.
That's a problem with it, actually; it needs a really good DM to pull it off. When I ran it - and it was one of the first modules I ran properly, a very long time ago when I was still in high school - the group found the old storyteller in the Inn of the Last Home, he told them they had to go to Xak Tsaroth, and they said "Right! Let's go!" and bypassed the first section entirely.
It's an adventure I really want to run again, because it really is quite brilliant. Lots of flaws, definitely, but it's one of the most interesting and accomplished works of the best writer of adventures for D&D ever. Where classic Doctor Who has Robert Holmes, D&D has Tracy Hickman. (This makes Terry Nation=Gary Gygax, which might be appropriate).
Unfortunately, it's in the beginning of the next module, Dragons of Flame, one of the most linear railroads I've ever seen, that things fall over. It's the weakest module of the first four - and
#3 (leading the refugees south) is again an adventure that can be fantastic but needs a DM at the top of his or her game to pull it off.
Cheers!