From my point of view, "XDA Milestone" was innovative with the usage of left-aligned legends on spherical keycaps, it's not that it hasn't been done before, but in my opinion, "XDA Milestone" did it right
However, "XDA Milestone" seriously lacked consistency, it was like a native SP set in terms of consistency, legends/modifiers seemingly had different sizes, alphas were left-aligned, modifiers were center aligned
MiTo's "Canvas XDA" seems very consistent, even more consistent than the examples nubbinator provided
My criticism is modifier selection, instead of repeating some modifiers in multiple sets (for example the 1.75u shift), more/unique modifiers could've been added