Let me simplify the glitch for y'all.
For me the only real benefit was running a mix of engineer and support. So I put the ammo bag into the gadget 1 slot and then removed my 2nd gadget. On the engineer I removed the gadget in the 1 slot and placed whatever launcher I wanted in the gadget 2 spot. When I want to spawn I would press these 3 buttons quickly in order. First make sure you are over the engineer slot then press X R1 L1, you should then see an ammo box and the launcher in your gadget slots. The one thing is you wont know what gun you will get. It could be either the engineer or support gun.
This will work with 2 classes near each other. I did run the assault/recon class on Parcel last night. I wasn't sure what to give up for the assault. I know I wanted the beacon and I decided on the medic bag.
Last night we pummeled the other team every match.
25-0 Locker(We were up this game by about 200 tickets, we switched teams to even them out and were able to comeback and win)
642 - 0 Golmud
643 - 0 Shanghai (SRAW sniping was in full effect)
527 - 0 Locker
523 - 0 Zavod
174 - 0 Paracel Storm
After I left you guys still did well, just not as good.
448-0 Hainan Resort