No comment on the half-baked camo.
Regarding the Dra C Custom shoulder thrusters, I'm more inclined to think that they do could have originally belonged to a Gobble:
-As Mark stated in another thread, a Jicco is probably around 60m longs, which would make its thrusters too big for a MS.
-The Gobble happens to have 3 main thrusters, so they could have scrapped a couple of them for the two shoulders of the Dra C Custom. The need to scrap two Gobbles could be the reason it's not as common as the standard Dra C.
-The Gobble is the predecessor to the Gattle, whose thrusters were used for the standard Dra C, which makes more reasonable to think that another unit of the same type would be candidate for a similar design.
Anyway, I'm particularly hoping that since the Dra C Custom uses a regular right arm manipulator, that we may end up seeing a Dra C, Zaku or other Zeon MS wielding the handheld version of the Dra C's gatling gun, as depicted in the HGUC kit:
http://www.dalong.net/review/hg/h133/p/h133_39.jpg
http://www.dalong.net/review/hg/h133/p/h133_46.jpg
The shot showing the GP02A with the anti-ship rifle from The Origin gives me hope of it being possible.