Lou Scheffer's cryptanalysis is still fairly shallow. It seems like Lou themselves weren't too sure about Malbolge's capabilities (see below); their website remains mostly theoretical the entire time.
> The day that someone writes, in Malbolge, a program that simply copies its input to it's output, is the day my hair spontaneously turns green. It's the day that elephants are purple and camels fly, and a cow can fit through a needle's eye.