-1, this takes way too much from all other battalions that ultimately makes them unique from another. If they're gonna be a "sub-unit" why should they have more power than anybody other than themselves? Their duties are to protect Senators. They had nothing to do with interrogations/hostage negotiations unless maybe it was a senator. Hell even Argyus, a CAPTAIN, of Senate Commandos, had nothing to do with the interrogation of Gunray, he only protected the cell until it came to his escape.
This is too many specialisations that battalions on the server already have. And like I said, the Senate Commandos guard Senators, not VIP's unless like again, a Seperatist senator held captive. Protecting VIP's are Shock troopers job. Sub-unit or not it makes no sense. 104th deal with negotiations, job taken, RC/Null are practically the assassins/interrogators. To have these roles removed from each of these units would be downright annoying for them and leave a big hole as to their existence.