You seem to be asking for two different things: hiding fields and not populating certain fields when doing imports.
You can already do the first: hide fields both on the main display and in the tag browser. For the main display, see preferences -> add your own columns and uncheck those that you don't want to see. For the tag browser, right-click on the category and select "hide".
To my knowledge, the second is not currently possible. I don't know if any developer will be interested in doing the second.
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