What does bia upgrade provide ??

There’s been a couple of threads on this. Here’s one I made about a month ago 

 

The only thing Bia level 20 does is allow you to pay for bia level 21. Is that weird? Yes, I think so! It’s pretty weird and seems like they ran out of ideas. 

Ran out of ideas? Well let me give them one. Level 20 Bia reduces its cool down time by a couple of seconds. There you go!

it would have been less bad if they made 0.5 sec for 20 and 0.5 sec for 21 rather than this ?

It should give an increase to move speed based on how the pattern all the other levels followed.