One thing would be to implement AI vehicles. Lore-wise/RP-wise, maybe the faction doesn't want to respond with more expensive mechs, so they defend these worlds with vehicles.
Attackers still get a fight (albeit an easier one), get a chance to earn XP, etc. Defenders, especially those on the Clan front (ie. Kurita, FRR, and Steiner) who are defending 2-4 fronts NOT including their southern borders, they can focus their attention without having an easy march on their undefended border. For low-population factions (or when the big merc units are on the flip side of the border), it allows them to actually defend and at least draws the conflict out.
Add to this, I'd have the window for a planet go at least two weeks, and have control of the planet rest on the TOTAL percentage of victories. What's more, make the threshold 60/40 in favor of the defender. Planets wouldn't trade hands as quickly, you could go away for a night or even a day or two, and not worry that you're letting your faction down. It wouldn't feel like an inevitable tide when a Faction gets on a roll.
That was one of the reasons CW2 died so fast. I went on a roadtrip for a long weekend. When I left, the borders were relatively similar to the start point, we were even pushing in some areas. Came back annnnnnd...JF and Wolf had blown through Steiner space and there didn't really seem like any point in continuing. I missed four to five days and everything changed - that's frustrating. Slow that pace down a bit.
Edited by Dawnstealer, 04 February 2016 - 09:31 AM.