The Druid does not get scent and blindsight anymore.
However, I disagree with people who say that "Wildshape is only good for combat now" and the like.
Scent and Blindsight were horrendously overpowered.
Giving Druids the ability to, virtually at will from level 5 on, detect invisible creatures without making checks was insane. Clearly, these abilities had to go to give sneaking rogues half a chance. Canny Druids could even get both of them at once, or with a level 3 spell (non-core)!
"But now the Druid can't use her wolf's nose! Nor can they use the bat sonar!"
It is interesting to me that everyone complains about these two abilities. If I heard more complaints about Cheetah Sprint, for example, I'd be more willing to accompany the player.
The thing is, Druids, when they Wild Shape, still get the racial bonus skills/feats that the animals have. Wolves have a bonus to Survival checks when tracking by scent. "That's not the same" you say, but the problem in this case is the lack of a skill check to smell things. There's Listen for hearing and Spot for seeing. What is there to smell something? Going by the DMG, creatures that track using scent use Survival checks to find things.
When turning into a wolf to track, I see no problem with giving them that bonus on their survival checks, so long as their quarry has an odor. Why, Dire Wolves (maybe normal ones, I don't have my MM here right now) even have Track as a bonus feat, so you don't have to take track! In fact, just giving track as a bonus feat allows a Druid who doesn't have the feat the ability to do more, with that wolf's nose. Just because it's not called Scent doesn't mean the Druid doesn't smell things better.
Moreover, non-combat Wild Shape has been improved by the arsenal of items that the Druid can use. Want to spot something? Use a hawk for its huge racial bonus to Spot, along with lenses that also aid this endeavor. Many animal forms have bonuses to their skills that you can use to your advantage.
Then you turn into a Dire Bear and rip them to shreads.
Also, you can generally get Animal forms faster now. The lack of the Dire restriction allows you to get their forms sooner. The HD restriction was already "built in" to the 3.0 system, because very few animals had more HD than the Druid did when she could first Wild Shape into them (IIRC, by a few I mean 1 or 2). This makes Wild Shape more exciting and varied, as each level the Druid can gloss over new forms, rather than getting a whole bunch new forms every 3~4 levels, and choose the best one for that specific HD for the specific task.
In other words, once you hit Level 8, the Polar Bear isn't necessarily going to be *the* combat form until level 12. Other animals with 9, 10, or 11 HD may get some use before you skip right to Dire Bear.
Last but not least, the addition of Natural Spell to the Core ruleset allows the Druid a lot more flexibility in when she can afford to Wild Shape or not. It also makes many new forms that aren't bears a lot more combat-effective. For a given battle, do I need mobility, hit points, AC, a decent Reflex save, or raw damage? Other nifty things, like dropping for SNA, and the improvement of Call Lightning, allows the Druid tricks that she can employ.
Wild Shape has only been weakened in the fact that you don't get two overpowered abilities for free that you really shouldn't have gotten. In all other aspects, it is more varied and powerful than it was previously.