I don't currently do not do any calculations with any feats, including those granted by classes. This does expose a bigger issue, I do not have any place in the the HP section to allow for a player to manually entered bonuses that can then be can be calculated in to the totals.
Adding in a sub-selection for class styles (fighter, ranger, wizard implement mastery, warlock pact) , and either displaying or calculating in bonuses granted, by them is something I am considering for my next version. Though adding in selections for feats and calculations for their granted bonuses, might be outside the amount of work I am willing to to. as is powers selection.
My Powers index is a modified version of yours.
There was a brief moment when I thought I would enter in all the powers data and was going to re-work that whole section. But then I decided that for now I would simply stick to players manually entering names of powers into the sheet, and use the powers cards I have already made with MSE. They will not be be auto calculated, but all my players can handle much more complex math that that required of the cards.
of course, if someone were to do all the data entry, I might have to find a way to merge that data into my sheet.