[Gameplay] Guinsoo's Rageblade stacks do not increase TOTAL attack speed, only bonus attack speed

This is either a gameplay bug, or a tooltip bug, or both.

The tooltip and patch notes state that 8.6 Rageblade increases total attack speed with stacks, not bonus. However, gameplay shows that it is only increases bonus attack speed.

Replicate: Just go into training mode with a Rageblade and do the math.

Example with Kai'Sa's base stats.

Level 1 = 0.644 attacks per second. Level 1 with Rageblade (+25%) = 0.805 attacks per second. Level 1 with Rageblade (+25%) and 6 stacks (+48%) = 1.115 attacks per second.

However, with 6 stacks, that only makes sense if it is accounting bonus attack speed only. You get the same result if you multiply 0.644 * 1.73 (73% bonus attack speed).

If Rageblade was doing as advertised and increased total attack speed, it would be higher, as you would be multiplying 0.805 *1.48 = 1.191, resulting in a higher number.

Total vs Bonus is the keyword that appears to be messed up here.

You can also do the math at 1.7 attacks per second, and it will increase to 2.0 attacks per second instead of 2.5.