It's been a tradition with Anarchy Online to nerf a profession, and 5 or 6 patches later give that profession some love back in the form of new nanos, armor, etc.
May I suggest that in return for eliminating the Trader's status as a healer, and the MA's critical hit/low light scope nerf (which will primarily affect the high crit shotguns that traders wield), that the following class repairs be done at the same time.
Entire line of Trader charm spells: Totally useless. Not sure why someone thought it was a good idea to turn a person to stone for up to 30 minutes, but casting this nano will almost always get the Trader killed from other mobs, spawns, run-away pet, etc. Even if it doesn't, who wants to stand in place for half an hour unable to move or cast or attack?
Fix: Make the freeze duration (and pet control duration) 3 minutes just like most trader spells, OR keep attack and nanos frozen while allowing the trader to at least move, OR keep all the durations the same, but change the spell to non-hostile so it can be removed (and the pet released as well).
Relentless slayer: Obviously broken. Like Balanced Striker & Fine Tuning, it should give the user a bonus to ranged init. Instead, it gives the user -200 to ranged init. When you compare this nano to guard convoy, it's clear that this is an error.
Fix: Put Ranged init back to +200 so we can use this spell again.
Tradeskills: This has been a sore subject for a long time, but i'll mention it again. GIVE US SOME WORTHWHILE WEAPONS TO BUILD! What might have been the most interesting and enjoyable aspect of Anarchy has been turned into endless backpacks of never used trade skill items. PLEASE give this area some attention.
Fix: Allow us to create just ONE gun or melee weapon that cannot be bought or found on missions that someone actually WANTS.
That's it. Nothing outrageous or unbalancing, just a few fixes that in my opinion should have been done long ago. It's a fair exchange that should keep traders happy.