Why can't people understand the awesomeness that is the Krogan Shaman?!
Are you all PC players or something?
Seriously, Shaman is a tanky powerhouse with one of the most powerful biotic explosions in the game. He can detonate multiple explosions in one Shockwave, can detonate Biotic and Tech, so works with most teams. Survives things that cripple lesser characters. Even without a melee build, his melee will still dispatch mooks, hell, my biotic explosion Krogan backhands sh*t on Platinum. I don't even use a real gun on him and do fine.
And for those so inclined, Shaman has Warp, so he can incendiary glitch. Me? I prefer Warp Ammo.
If you can't understand how awesome the Shaman is, go back to Bronze until you learn how to play.
MRWAHAHAHA! BOOM! AHAHAHAHA!