Uhmm I dont think 3.36 is too low. It is kind of lowish, but it is not low enough to exclude you from anywhere. 3.36 is not abysmal. Is ur UG GPA 3.36 or "it drops just below 3"?
If the latter was the case, then yeah it is kind of low.
Although, given your research experience and the fact that the committee knows you, I think that'll be enough to tip the scale your way. If you address all of these issues in your SOP (GRE, age, etc) , I think you'll be fine.
Im optimistic for you . Hopefully you applied to a LOT of programs . That'll increase your chance of acceptance (not just you, everyone really).