[Autumn]

The most jarring thing about arbalest is that your armament's weight is nothing but a detriment. Straight cannon should deal bonus damage based on its weight

Now that Excel bows exist, this method of rewarding weapon weight has been erased unfortunately, I actually think Straight Cannon itself is pretty fine, I would consider buffing Heavy Tackle, and perhaps Arbalest Specialist in pursuit of making weight matter, as Blowback/Buster get a bonus based on sub-weapon power, which can be loosely tied to weight if all the +power upgrades have good weighty materials to them.

Mainly the thing that encourages arbalests to build low weight is the weight% penalty on Straight Cannon, with no forseeable upside to having something a little heavier.