Sloped text nodes along paths in a slanted scope seem off. Is there any way to fix this?
\documentclass{standalone}
\usepackage{tikz}
\newcommand{\yslant}{0.5}
\newcommand{\xslant}{-0.6}
\begin{document}
\begin{tikzpicture}[scale=2]
\begin{scope}[every node/.append style={yslant=\yslant,xslant=\xslant}, yslant=\yslant,xslant=\xslant]
\draw (-0.5,5) -- (-0.5,2) node [midway, below, sloped] {weaker control flow};
\draw (-0.5,5) -- (2,5) node [midway, above, sloped] {well-formedness};
\draw (-0.5,5) -- (-2,2.5) node [midway, above, sloped] {number of exits};
\end{scope}
\end{tikzpicture}
\end{document}

Edit: I don't just need the axes, here's the whole figure:


