I find the upgrade column a bit deterrent. It works well and is all right once you get used to it, but I think that you would especially do the beginners a big favour if you arrange the upgrades in a way that gives them an impression on what kind of upgrades they will be able to buy with more SP.
It doesn't need to be a list of upgrades. You could arange the upgrades in several columns instead, like "strategies", "units" and "improvements", or in game-style related ones like "defense", "stealth", "low-budget" and "elite"(strong, but expensive).
Being able to switch between different arrangements would be a really nice additional option, but most porbably too laborious to program, wouldn't it?
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Versão brasileira: Herbert Richers.