Actually, i think they changed it so they could separate the level from the actual hitpoints, allowing boosting armour and other items to be allowed into the game <_< The less 0's was just an added bonus. They said in the dev diary it was for low levels, but eh... They added the constitution change for the low levels AND potential LP increasing armor, stop arguing. For the topic I don't think they should separate prayer and summoning currently. There just isn't any good reason to right now.