Make the wars about something more likely and meaningful, and perhaps nerf high/low-sec mission as a consequence to this giving players incentives to go help in the war-effort etc. It could be freaking great, if done right and balanced, or maybe not if pulled off half-assedly.
Why is there always someone to systematically flamebait with "nerfing high sec missions" when it comes to the subject of incentives for players to go into lowsec ? These damn missions are already so unrewarding that I have difficulties to see it otherwise... :/
I'd like to see the alliances changed. Caldari-Matar and Amarr-Gallente. That would even out the distribution of players on each side, remove the good side/evil side paradigm, and make more sense from a training viewpoint (hey, you use shields? I use shields too!). It would also be more fun, after all this time - how does a liberal democracy handle teaming up with a monarchic theocracy? How do a State of corporations handle working with a Tribal society?
This would be a shake-up that would actually be interesting, and force everyone to make some interesting choices. Including me, with my roughly 10.00 Empire standings. 
But, I don't think it will happen.
Sounds interesting.
I don't see it as easily doable without the sort of storytelling that I would prefer CCP avoid - in particular on the Gallente-Amarr side of it. Unlike the Minmatar/Caldari, who before the war could have cared less about eachother, the Gallente and Amarr have quite a lot of incompatibility built in.
I could list as many as incompatibilities between the Caldari and the Minmatar, mostly on their society. Even if it is true that Gallente-Amarr are some kind of archnemesis to each other, there was also huge affinities like Aidonis-Heideran, and a supremacist mindset.
That dynamic could even become extremely deep potentially since most Amarr/Gallente would literally loathe that alliance.
EDIT : What I mean is that I don't consider the Caldari and Minmatar to be closer to each other than the Gallente and the Amarr are. Both relationships are extremely antagonistic and yet share a lot of inner values.
Where the Caldari and the Minmatar share the same inner values, their external values are completely opposed. Internally, both the Caldari and the Minmatar strive for their own people and try to evade each a different invasive/supremacist enemy. They both are very proud of their own and selfish in their own way, just willing to remain in their corner. They also both live in collectivist societies, where the individual is lessened compared to the whole entity. However, on the form, the Caldari follow meritocracy/oligarchy/plutocracy and all of this applied in a cold and efficient way (I never completely believed in passionate irrational Caldari about their traditions, they just care a lot about it because it has to be that way and not another, but that's just me), where the Minmatar mostly follow rules of seniority/symbolism/fate and all of this magnified by emotions and passion.
Where the Amarr and the Gallente share the same inner values, their external values are completely opposed. To the core, both the Gallente and the Amarr believe in a superior ideology and way of life, and both believe that every man has to better himself and others. They both believe in the well being of everyone on the long run and both are societies based on the individual before the collective. However, on the external side, well, the Gallente have that selfish hedonist prejudice, where the Amarr have that religious stuck ups cliche. Liberty vs Celestial Order. etc.
Heh, if I ever wanted to go into the rubbish, Minmatar would be fire, Caldari ice (2 faces of the same thing), Amarr earth and Gallente wind (2 faces of the same thing).
Am I rambling ? Oh yes, probably. Sorry for the derail.
