As for protectors..the way the descriptions sounds when you choose one, it's as if you decide to follow a god..or godlike being, which now holds power over you. I haven't seen that implemented for real, being obviously there would be a LOT less worshippers around then.
Offtopic: Gods..in their own pantheon, Odin or Zeus are the highest. If you follow the norse or the greek mythology, you'd claim there was no higher being. If you follow one of the monotheistic ones, then "your" God obviously is the only true one, and everyone else's religion is heresy by standard...though nowadays religions aren't so strict about that anymore.
Some claim each god is an aspect of the "god principle" or so, which would be the true god, just us having failed to grasp it. The sum of all past, current and future gods would be that then...
And how would a god worship it? That would deny the own godlikeness, due to saying I am not god, he is, and then undermine the own position...
Ontopic:
Isn't it just simply your choice whether you go to mp6 or not? As it was said, it's an experimental stage, and not many reach it, and even less hold it for a very long time.
About next MP Level
The next stage is a special gamestage. Not all players reach it. [...] As a protector you will not have many oponents to fight with but you will be more involved with group play. In MP6 your creatures or millitary progress is no longer important, but your popularity is. [...] MP6 is a temporary level. [...] MP6 is not the last level, but its a different level.
See? Loyalty points to be gained on mp5 fall under the fighting aspect. Aside from one or two shop potions there aren't many any other ways I could think of...ultimately heat and allymember fighting fall into.....well, fighting.
That above is the text you are supposed to read when aiming to become mp6 as a mp5 btw. I took some parts out due to no relevance.
If you want loyalty points, DO NOT TURN MP6, or simply fight getting EXP reduce, no matter how.