It has been discussed a fair bit in #swarm-general so I've decided to make a post to collect feedback. My own personal experience is that both the passive and the ultimate feel as though they need adjustments.
For the passive the speed buff feels too unpredictable for standard gameplay. While it is predictable in the sense that if you get hit you get a speed boost often times it doesn't feel like much of a choice if we get hit or not causing the unpredictability. For instance in times like the floor is lava event or stay in the area event we are trying to have very fine-tuned small movements and getting hit can cause us to suddenly have a huge boost in speed causing us to instantly fail those events. My suggestion would be simply to tie the speed boost into the ultimate. Speed boost is fun when it is predictable but given that it is a passive and we may not always want a speed boost when we are trying to fine tune our movements putting it onto a controllable skill might increase the enjoyment of the speed boost.
The second thing has been my own experience but I am not a fan of the small size of the ultimate AOE. As it stands the ultimate does not extend out past the range of close quarters abilities. Given how many of those skills pycko has it can be rather hard too get kills with the ability. In trying to complete the kudo of doing damage with the ultimate I have found frustrations in my abilities killing enemies before my ultimate has the chance to do any damage. Extending the range might be helpful.
These are just my experiences though. I would love for others to provide their own.