Are you sure that it's the final weaponbalance at 1.5.0.
The changelog looks kinda beta with all the additional info and logs in it. (also kinda confusing)
example:
// reload 540->495 (8.25s), startup time 21->15, recoil 10->9, startup time 15->12
or
//damage 122->118, recoil 70->60, recoil 60->54, speed 137->130, speed 130->135, speed 135->136,
//speed 136->132. damage 118->122, speed 132->135, damage 122->119, speed 135->134