Big fan of this LCP, just a couple of minor observations.
The Fragmentation Launcher seems quite weak for what it is. Cone 3 isn't a particularly large area, smaller than a Blast 1, and 1d3+2 is about the same damage profile as a 1d6. Compared to the Mortar, which is 1d6+1, Range 15, and Arcing, it's somewhat underwhelming. Did you mean to have a Threat on it, or a bigger damage die, or even a small range? It'd justify the Inaccurate tag more.
Secondly — would it be worth making the Heavy Nexus Accurate? As it stands, the Smart tag is very value-neutral in that most enemies in the standard lineup have equal or higher e defence than evasion. That, and it would help it synergise more with Centimane's Rank 1 talent.