As of right now, all bonus stats get same increment when you invest points to those.
Some however never worth investing, as amount you get from those are completely insignificant. Those need to be buffed big times:
FFYL duration - 10-13% increase you hardly will ever feel as different. Need to be about 5 times more to feel significant.
FFYL movement speed - even more so. having twice increased movement speed in FFYL might feel rewarding. But 10-13% is really nothing.
Reload speed. Likewise would feel meaningful if players can reach about 50% reload speed increase. With 10-13% you hardly will ever notice the difference.
Health/Shield increase, and shield delay/recharge - need to be about twice higher (to 20-25%). Those are defensive modifiers, so won’t really help you kill anything faster. But can help you stay alive if modifiers are high enough. Right now it worth investing only in DPS modifiers, just to kill everything faster.
Accuracy and recoil reduction - once again with 10-13% you hardly will ever feel any difference. On 93% gun accuracy that won’t get you even to 94% (100 * 1-(0.7/1.1) = 93,63%). And 94% still very low on sniper rifles. To get that increase from 93% to more reliable 97%, modifiers should be more like +80% to 120% (100 * 1-(0.07/2) = 96.5%. Recoil should be be be closer to 30-50% increase, to feel meaningful, as just overall simply can be felt as increased stat.