whi you not making the real growing of char compare to mobs? It will bi good idea to grow to maximum at list as Gigant troll, it wiil be more interesting in PvP too, when small will be fighting big ore re rial butle of the titans.

add body creating to be more different... fatt - slim, long hands, legs, & it must effekt the fight!
add normal characteristics as str, dex, int, 1 poin per lvl & only 1 to doo real differens betvi same lvls.