Hey, first post here, but by no means the first post I’ve made on any forum. 
So, I’ve browsed the forum about this Augment called “Pineapple Juggler” - and apparently it’s crap. But most of the threads I’ve seen about it were posted nearly 6 months ago - a lot could have changed between then and now.
I haven’t done any recent testing, but from what the description says, you can throw back grenades. Does this include everything that’s chucked that goes boom, like Nader’s grenades and Martyrdom (if you’re somehow quick enough), Skyhammer’s Airstrike Flare, Fletcher’s Sticky Bombs, and maybe even unarmed enemy Proxy mines? Or is it only strictly Fragger’s Frag Grenades?
It’s a pretty sad ability if it’s only Fragger’s grenades. If it is, I could suggest that pretty much everything I listed above (well, except Proxy mines, heh) be added to that chuck-back list. Maybe put it on a cool down if it got applied to Nader’s LACTIC-40 grenades.