I will try to give you one then
Why do people play shades?
They have long and complicated chains of perks, need to be behind targets..
Why don't everyone play Adventurer?
The answer is challenge, when you get bored with having an easy time you do something more challenging.
and for the shade the extra effort means an extra reward.
I have it the same way with the trader nanos.
If I just need to execute one nano, then it is right back to what soldiers do: weapon damage.
with 2 AC nanos, 2 Drain nanos and a health drain I have the option of a combination or specialisation, if I only have time to cast 2 or 3. in effect a
choice.
on top of that the laddering of skill drains is because of casting one line, then one from the other etc. you should know the drill
I find that mechanic fascinating, a way to teach players that nanos is not just -one- single thing, it is layers that can be stacted, if you have a good grasp.
Rather simple actually as they have different names and aper in the NCU, for me it adds complexity, which is what I like about AO. It adds lifetime to AO, as a new player can keep learning and experience something new.