That´s true. What I usually want as GM from these expansion books are mostly information about cities, maps etc. Also game mecs doesen´t matter that much for adventures. Of course you can get these online too, but book is a book
I sure hope there will be some information how to use 2nd edition stuff with this one. And who knows if players still like 2nd edition better, but I am getting this edition as well and figure out how things work.
I couldn't agree with you more. Adventures, and game world fluff is what helps roleplaying and GM:ing the most for me. Mechanics and rules are pretty much interchangeable between, not only editions, but entire RPG's made by different companies.
While some rules systems can be harder to convert than others (due to their pesky design), I have yet to encounter a system that is completely impossible to convert to another game.
However, as you've might have noticed on this forum about this 3rd edition, most players don't agree with me. They seem to want everything served fresh on a silver platter (just my perception and not meant as an insult).
It's a shame really that most of them don't seem to share my point of view on RPG's in general. My view provides a pretty solid guarantee that you'll never be affected by gaming companies doing drastic rule changes to different editions.