A lot of interesting new mechanics. I feel like Suldan values Lock-on a bit more cheaply than base Lancer, but that isn't necessarily a bad thing, just an adjustment to the tactical calculus. Lock on is easier to get and there are various PC options that need lock on but don't consume it. Giving Lock-on a lot more play adds tactical depth.
I really wish the terminology with Nexuses was more consistent. The original Lancer was clear that the Nexus is the hive/armory/hangar from which small drones or micro/nanomachines deploy to attack your enemies. Basically, the nexus is the Gun, and the shells/missiles/drones it shoots or deploys are not themselves nexuses. The flavor text confuses this repeatedly.