Combat Engineer - is OK but needs a good player to bring out the best in that class. As one of my PCs is playing that class at the moment any suggestions on which skill might be appropriate to the kind of large scale (but temporary) structures they might come up with? Structural Engineering seems more buiilding-focused.
Black Market Merchant/Smuggler - I don't really see the need for it - Trader (from companion 1 i think), would be well capable of covering this niche. And in the skills bit - "All primary skills, except Combat and Weapon skills are developed as an Explorer. Combat and Weapon skills are developed as an Entertainer. All other primary skills ... are developed as a Criminologist." Huh?
Tinkerer/Scavenger - again, a niche that can be covered by other professions. While there isn't a generalised "Technician" class, most techs are good enough at all tech skills to not have a problem there.
Android/Robot Hunter: Too specialised. And generally not helpful in an age where androids are people too.
Psychot - I get the concept, but I've never had a player remotely interested in playing one. too much effort, since the drug rules don't really fit in with the concept.
Bounty Hunter - again, I question the need for this profession. Armsman, LEO or Criminologist could fill the niche.