I like how it can be used as both Forensic Toolkit (FTK) software which will help analysts with data recovery issues for example, but also as part of your normal day job by providing detailed information about file system structures etc..
The UI could look more modernized than what we have today - maybe even using Material Design guidelines? Some features are still missing compared to other open source tools out there such as ExFAT support would make sense! Also some fields don't seem to work properly so it's not 100% reliable when comparing files between different versions. We've been able to identify problems earlier in our development process thanks to this tool and were finally able to improve overall performance/speed while decreasing storage space usage.