The idea is quite simple - could we have a search input with results showing as we type? As my slices are growing rapidly it's becoming harder and harder to manage and find stuff. Obviously I could use search function from the browser but I'd prefer to have that input to perform that function and show results as I type filtering out names that are not matching.
I think we could even benefit from some filters like "Missing screenshot" or "Not synced" to make managing slices a bit easier.
Overall it could be taken even further and you could give us some sort of grouping for slices - categories or directories would work really well from managing perspective.