Obviously in isolation it'd be a huge nerf, I assumed that people could read into my statement that it would need to be balanced in other ways. I probably should've been more explicit.
I like the 'principle' of having drains that are more 'active', with a low nanocost, low cast and recharge time, and low duration (5-20s, somewhere in that range). This would need to be balanced by providing non-nano healing, offensive and defensive actions for traders that allows them to AT LEAST maintain their current pvm and pvp offensive and defensive capabilities.
A 30s equivalent of an AAD/reflect perk buff (500 AAD, 25% reflect for 30s, 2min recharge), a decent perk heal or health regain aura/hot, and a static 10% crit buff would be examples of what I'm referring to.