I wouldn't mind a higher level cap either but Im also having fun leveling up every allegiance. They all have different armors, weapons, relics, and magic. Zeus is awesome for magic, Ares is awesome for strength and power, Hades has healing abilities, and poseidon is super helpful in team based matches.
Proof? Just go and see each God Weapons on this site - hence the Coming Soon on 2 hidden weapons.
To wield it you will probably need to level up past 30. So stay tuned, don't QQ any more, max out all the Gods in the meantime and just have FUN regardless of lvl cap.