Losing points ? On level up ? That would be a BDD : Bad Design Decision. Maybe upgrading stats would need 2 "level up points", then some stats would need 3 "level up points" and other only 1 "level up point".
But I really hope we can chooose whichever faction we want and create the sov we want. Why would I have to take a magic sov if I choose some factions ?
Maybe when you create the sov you can choose between several kind of sov that would decide the cost of adding points on level up.
Examples : On level up you get 0.1 points in every stats and 90 points to level up. The costs are for adding 0.1 point in a stat. Attack(10) means for adding 0.1 point in attack you spend 10 level-up points. (You can save some points between level ups, you could even use those level up points to get some perks)
Melee : health(6), strength(7), defense(6), speed(10), sight(9), essence(7)
Sorcerer : health(10), strength(9), defense(8), speed(6), sight(8), essence(4)
Barbarian : health(4), strength(4), defense(12), speed(8), sight(8), essence(9)
Summoner : health(10), strength(10), defense(9), speed(8), sight(5), essence(3)