Some of those suggestions are quite nice. i like the black lotus ECM nade... although i think she can lay an ECM brief case.
FINALLY reworking the heroes [coz i think the heroes in Remix 3 is useless ingame, especially USA superweapon heroes]
Black Lotus is weaponless, give her some weapon please. shuriken with poison for long range [charged] n small dagger for close combat maybe? n 1 more, maybe give her speciality to lay an ECM mine will be usefull than disable single unit.
Only idea how about replace "Superweapon Burton" with a lady one like Tanya maybe?