title?

Would be nice if we could, without any negative effects

Not really "reset". You can remove and add perks with console commands, but you have do that one at a time.

The "help" command helps here, type

help "perk name" 4

into the console, and it displays the hexadecimal code for it, after that, use either

player.addperk

to add a perk or

player.removeperk

to remove one. Multileveled perks have several codes, and since i haven't done this myself with them i don't how that works exactly. But save before doing anything, and experiment