It really appears they changed it so what we give out is pretty darned useless, but what we get back can be pretty nice pending who we cast it on. Like, they changed it so people won't require a druid in every group so they *receive* some useful symbiosis spell. This basically allows us to make the choice who we want to cast it on, and what spell we want in return, rather than being stuck to giving it to classes we provide for, but may not get something so nice back from. It turns the spell into one all about us, rather than them....though >.> that guardian/dk set up was pretty win-win.
Sounds like this has changed from symbiosis to parasitism.