The feedback you got on the 14.6 nanobreed changes make it pretty clear that nanomages need more than just a slightly larger nano pool to make a viable alternative to solitus.
Homo nano is supposed to be the best breed for casters, who tends to spend a lot of nano, which means that more nano isn't such a bad idea. As long as the other breeds refill their nanopool with the same speed as nanomage, however, there is just no point in having a larger nanopool..
I therefore suggest you take away the extra nanopool that was given to NM in patch 14.6, and give the breed an innate 10%-15% nanocost reduction instead.
More nano alone is no good if you don't live to use it. Max life is a lot more important than most things in this game, and nanomages need more than just some extra nano to set them apart from the other breeds.
Since it's supposed to be the caster breed of choice, how about some advantage at nanoformula execution? A moderate 10%-20% reduction in casting and recharge times would benefit all casters, regardless of level and equipment..
Third.. There's no decent armor for nanomage casters. Carbonum wouldn't be too bad with other requirements (agility is too expensive at lower levels, while stamina is capped too low at higher levels - nanomage needs int/psy armor!) and hp + nanoskill modifiers. (don't forget ncu/nanoinit, though..)
/Buurn