We know that once you learn a particular skill/spell (say track as a ranger), then you remort into some other caster class, then finally remort again into thief, it would mean you have to relearn track and every other common skills/spells that you had as a ranger. Of course, this applies to all sorts of combinations.
Now you have a chance to vote on a more simplified system. Choose which circumstance should players not have to relearn the skills/spells they have already learnt.
Thanks