Remember, the -hit debuff requires a certain build, as a non eva built SB I don't use it, I CAN'T afford the SP points to place into that tree and have my other skills, there's also no point cus my eva is shit lol. I can't comment further on this aspect of the SB because as I said in my SB thread, I have 0 experience playing as an Eva Merc/SB and limited experience VS them because I've only ever faced a handful of Mercs in all the BFs I've been in and the 2 that used evasion are Ex and Angel3.
The reflect % is too high, I agree on that, a 10-15% reduction would be appropriate at this juncture. The duration and cooldown are fine, CD has had 1 min shaved off from it's Merc predecessor but it's also had 5 secs shaved off of it's run-time.
As for silences, we have 3 silences. 1 is on a 36 sec CD and it has a 3 second run time, the second again runs for 3 secs on a 7 second CD but requires SB: Assemble be in effect. The final silence has a .1 sec duration and can only really interrupt, it's on a 6 sec CD and is ranged. Zerks > Vanqs have a similar setup in terms of debuffs but your CDs are longer to reflect the nature of the debuffs + the fact you have a reset skill.