Stasis weapons have the potential to be incredible. I really hope to see a stasis waveframe and a normal stasis breach loader. A stasis glaive could also be nice if glaives ever become good. As for perks I think something sort of similar to chain reaction would be neat but you freeze, swap to energy weapon and that sets off a shatter like chain reaction. Slowing grenades on the breach loader instead of blinding grenades would be neat. As for the glaive I think a cool exotic like perk would be shooting a glacier grenade after 4 hits or whatever. Or have it shoot the hoarfrost-z style wall. Another type of weapon that could be neat is fire weapons. So something similar to witherhoard but it's a pool of fire that burns combatants. It would also be neat if the fire could spread sort of like sunspots.