Except it isn't intuitive at all and would also need a little guide on how it works, it seems pretty interesting. And for the naked canoness (~40pts without faith-power) and
St-Celestine (~105pts without her resurrection rule), it seems to fit the point cost given by
GW. (Not that I agree with theses costs, but they seems consistent with my codex!

)
Also, maybe using comboBox to select values for these fields would be of a great help for the usability of your sheet.
Movement: (Infantry, Bike, JumpPack, Relentless, Slow&Purposeful, etc.)
BS,
WS, S, T, I, A, W, Saves, Invulnerable saves, poison, and all the other should be values selected between "2" and "N/A" instead of manual inputs (And '7' being the N/A choice in some case...).
Otherwise, it seems to have a pretty good potential, for a rough prototype!