missing stuff: FF2/Special: Kim stage can knockdown the passing by bikers if you do a cross level hit. FF3: Mai Stage could be thrown into the pillars. Mary stage has a special kill by doing a launcher: opponent tangles with the upper chandeliers. RBFF: Sound Beach left side after breaking the upper sign (and/or the lower sign) on the first round: the bar ceiling collapses and also the barrier where the broken sign is (must do Kim SDM). .
I wish they could make a new game with the gameplay refinements of Garou but with the stages interactions of the RB series. Some stages having ring outs and all those interactions (RB1), others having a wall interaction (RBS) and others having background interactions (RB2). This would be the perfect form of the game to me, not what they did with Garou, removing all FF characteristics basically.
On garou densetsu 3 you can also use Terrys upper in blue mary stages in order to make her jump really high. Depending on where on the screen you hit the the adversary, some of the lights may fall off.