Our spot colors are verified by our ink vendor using DE2000, and again on press for packaging work. There is a print quality verification service that specifies it, as well as the 1:1:1 ratio.
" Color difference formula: ΔE2000 Color Space kL* = 1 kC* = 1 kH* = 1, in accordance with ISO...
No contradiction here. The last place I worked printed everything with 300LPI hybrid screening (Stochastic below 5% and above 95%) We let 300ppi images go, and found there are very few instances where extra resolution was helpful.
I'm not sure if I have the latest version, but the one I have has a second tab for modifying custom data. It looks like you would need to get the characterization data from the profile, and will work with any patch count up to 1617.