Do you have more specific criticisms?
The mining section provides the user with no information whatsoever about progress. So the user is mining, but what's their relative power? Do they need to devote more cores? Threads? How long should they expect to wait before gaining coins?
I waited a while and then realised I could be waiting forever, so I closed the wallet.
Spreadcoin's mining tab addresses these issues.
I found the app a little too laconic and uncommunicative generally but you're looking for specialist help, so I thought there's little point alerting you to issues that you're almost certainly already aware of. Hence my confirming the severity from the user's perspective.
Cheers
Graham