A near death-blow for Planetside, that has since been rectified and made more interesting.
Now on to Core Combat (v2.0). When Core Combat was released, it officially was a near-death blow for Planetside. They released an expansion WAY too early (when it wasn't even wished for by the community), it was too buggy, and it advertised close-quarters, urban-style gameplay, which it did NOT deliver. It did bring in some new equipment (artillery, a very nice pistol, and a SUPERpowered heavy assault weapon), but those positives were by far overshadowed by the issues. Thankfully, those issues have mostly been resolved since then by well-thought tweaks and balances by the development team.
Since then, Planetside has grown in leaps and bounds, to be set back again by the addition of v3.0, Aftershock (the addition of BFRs, or Mech-like robots). Again, it was received with mixed reviews by the community, but has since been brought in-line and into balance.
Overall, I'd give PS a 10, Core Combat a 5, and Aftershock a 6.5.