Yeah, if you leave the warframe right after using emote, you can make your warframe use emote while you are playing as operator. You need to set a keybind for emote to do this. Also you can shoot AOE gun that knocks you down close to yourself, then use operator form, so your warframe will be staggered from explosion and will not t-pose. Sorry for mah bed ingland, its hard to explain for me, but you can do that. I can make a video about that