Windent, RAW files are RAW data, they need to be properly tranformed-baked to usable form, like TIF or JPGs. the RAW file contain all pixels unprocesse, unsharp, flat color, RAW convertor make from this "mess" a usable data......
Being able to import RAWs directly would be a huge time saver. But I do understand the issues in adding support for this, it would take a lot of effort to support those file formats (and keep them updated and working in the coming years).