wonderfully valid and balanced suggestions have already been made, countless times, by a large number of players. just b/c you are a new merc doesnt meant the devs will suddenly see the light and start making intelligent balance decisions
I think the reason we haven't seen major changes to the merc despite the constant QQs about the class being garbage in PVP is
1.)BW feels the class is fine the way it is based on it's pve performance.
2.)They don't know how to fix the class but are working on it. (if that's the case then just say something BW but you won't will you.)
3.)They have thrown in the towel on the Merc AC and are hoping that everyone with a merc rerolls and goes away.