First thing I tested with droppers. The click noise for firing seems bugged with them. I rigged up a bunch of droppers all feeding down to a dispenser, and the noise only kicked in after all the diamonds moved down to the next dropper (progressively adding comparators to activate them). These seem kind of... useless. Sure, they don't use items like a dispenser. That's useful. And they can function as a hopper without a direct input. But that doesn't seem enough to warrant an entirely new block. But then that's what they're scared of, huh? Useless stuff.
You know what would be great, if they now changed some stuff so dispensers could place blocks and items like seeds and what not.
Dropping blocks and items is now a function of the dropper, so yeah, maybe we will see that happening soon. :D