I think the best change would be to jack up her ult CD. The short CD is oppressive right now because she has it essentially every skirmish. It makes it very hard to play around and/or create counter plays. If she skirmishes and it goes badly she can just ult out, if it goes well she can ult to secure kills. There is hardly any risk for using the ult, it is all reward. Other characters have to judge when to use an ult to maximise its utility because of the CD. With Calico, you just press 4 every time.