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depends on your situation

for example, as rus: rush the culture techs you need at a 30% discount, then go traditional. The 2% loss for confusion is less than the 5% loss for the wrong school.
Same with uk... you're not likely to research a huge amount of commerce/navy early on, so scrap it.
 
Well I guess it's a necessary step if you want to change "research schools". You can't jump from "military-industrial complex" to "navy and merchant marine" (for example) you need to first go back to Traditionnal Academia
 
What determines which 'schools' are available after you restore the acedemia?
Did it as the USA and couldn't select any other school (or even have any decisions available in the politics screen)