As a slightly more complicated solution to the whole number thing, what about creating ‘battlegroups’ of 2-3 worlds. Each battlegroup fights for joint victory, but could consist of a mix between high population (or those frequently on WvW) and low population (or those less frequently on WvW). This means low pop servers could join up with high pop servers and still have a chance of winning. At the end of the two weeks, the groups can be mixed again depending on server participation, getter more even numbers again.
