Just by looking at the hardpoints and considering the current game mechanics, this "Unseen" is a single ballistic+lasers or laser vomit carrier unlike the ballistic boat nature of her bigger sibling which means that the Rifleman runs faster than the Jäger. Some possible loadouts are Gauss+3LL or 2LPL+4/5ML (a hotter Grasshopper 5H with better hardpoints location).
It already has great hardpoint locations so PGI could just give it so-so (offensive) quirks. If I could pick, give this Mech some decent durability quirks because I think it would need them the most (60t's paper armor combined with an XL engine).
EDIT: Added a comparison pic:
Edited by Hit the Deck, 17 January 2016 - 11:23 PM.