I love double threads…
From here: Knife and how to balance it - #9 by Ralendil
Something I have just done to see the global move speed of all weapons:
Considering this, if we reduce the move of combat blades, a lot of weapons have to be nerfed. And I even wonder if the 0.45 area (most weapons) should not even be nerfed also if we follow the global wishes of people fed up about dagger zealots.
Are you ready to play as turtles?? 
BUT: they could lower 0.8 to 0.6, 0.94 to 0.7 and 0.98 to 0.8 while putting 0.45 to 0.4. This would be correct.
So something like that:
This would mean a nerf impacting 68% of the weapons pool.
This would also, in fact, make the 32% remaining weapons feel better, so an hidden buff…