Hey Ratatosk,
Welcome. I am glad that you like the project 
We are open to any suggestions. And we are always interested in help. And you can of course also try to improve the icons. When your icons turns out to be better than the current ones, then count them included. I know that mine are a bit too colourful here and there. Some of them needs a few more development cycles. But it could be worse
Have you had a look at the icon sheet so far? Do you know how things works? Have you compiled Bforartists already?
There are also other tasks available when you have too much spare time left. Mainly around the documentation and tutorials at the moment