Yeah, his 'logic tree' is the size of a bonsai...one day he's going to bark at the wrong dog, and he'll be very lucky to walk away with his head still attached to his body.
Hmmmm, I'm not sure about 'incredibly high potential' part, but his stats are (probably) higher than 95% of Kranz's 'loyal' allies.
(I suspect that daddy is spoiling junior a tad too much...which is the biggest problem.)
Hmmm, the mangaka doesn't plot points for them yet, so like as not they're chill'n in the Green Room waiting for their call.
(I suspect we won't see the twins (in any major way) until the next big time-jump.)