So it appears that the level 5 "Upgrade" for the soulbound weapon mentioned in the title is in reality a huge *downgrade*.
Instead of the weapon getting *faster*, it actually gets slower than the lower upgrades.
Gaining attack speed of 25 or 50% only reduces recovery by between 18-38 frames (higher than 10 Dex means less frames saved by the attack speed boost). Losing 50% of reload speed costs upwards of 45 frames, effectively cancelling out the bonus and making the weapon *less* powerful.
I suspect the final upgrade was supposed to be +50% attack speed and -50% reload *time*, but instead it got -50% reload *speed*. This is partially offset by the Quality enchantment bump from Exceptional to Superb, but +4% accuracy and +15% damage does not make up for the increased reload time, and even if one were to erroneously call it even... then what is the point of the 5th upgrade level? The weapon was better at the 3rd upgrade level.
Can this weapon's final super-upgrade please be fixed so that it actually boosts the weapons power instead of nerfing it?