Yeah I must admited as a modder myself i don't actually like level system as they such. They can make it quicker to make and enimeys quicker to place (You don't have to set them to a default level) However it does't actually take much time to set different level creatures. Literally just make one for everylevl and specai lhave more base HP and you're done. You can place them where you want and alter the level at anytime. But yeah i dunno maybe that a too old fashion way to think about it