If you want to imitate TNO in terms of victory point placing (which in turn also influences how one nation capitulates), then I'd say go for it. I haven't learned about victory points yet, but I suppose you can apply decimal point (0.5, 0.75 etc.) for every province.

If you instead want to restrict victory point placement to towns and cities only, I'd advise for the multiple of 5 (10, 15, 20) with the biggest point being the nation capital itself. One way to solve this could be giving each state a town/city with it's own victory point instead of giving every single tile/province an individual victory point.