yea fast massing with fast xp with 1-2 heros is a little imba. first tell me this, what do ppl hate more? the extra gold they get if pooled from no hero or the extra xp at mass..
i think its mostly the extra gold that gives so much advantage with creeps and such
also it will take away some different strats that are semi fair like the player just keeping the gold to tech, but i guess its too much of a risk to leave it as it is for just that.
i thought of a way i can do it now but its gonna require some work to make it so first hero picking is free.. then i dont need to make it cost wood or gold for first hero.. but it will require me to change the whole system..