I can type in Dvorak, Qwerty, Zhuyin, and Kana direct input. If you are a slow typist, the problem is not the layout. It is an overreliance on looking at the keys and not taking the time to learn the layout by muscle memory. My keys only have labels for Qwerty but I can touch type in four different formats because I forced myself to use them. That process works. The individual layout does not matter much. How ergonomic the keys are also doesn't matter much. The limit is likely you.
I have no blur because I don’t use anti-aliasing at all. Different renderer settings can have a big impact on how the text looks at small sizes, which is why I commented. For a long time I used anti-aliasing with light hinting, full anti-aliasing with no hinting. I’ve never liked subpixel hinting (ClearType). In the end, I found that turning off anti-aliasing gives me the best readability.
This is FUD. Some businesses may have a policy of not using GPL software, but all the major enterprises, including Microsoft and Apple, use GPL software.