No really, past level 5 I'm not taking a single level. This class isn't bad, it's just boring. Bonus Feats... I think the Fighter and Wizard proved us Bonus Feats were not a good choice of class feature. Take example on Pathfinder, make it so each level is interesting (or, as many levels as possible). Also, waaayy too much pictures .Finally, you would play past level 5 so you could use all those abilities you got in the first 5 levels with useful spells. You really wouldn't want to multiclass because the rituals can only be used with ritual priest spells. Unless, of course, it was a prestige class, but good job roleplaying this with any of the divine prestige classes
Edit: An ability that gets more powerful with levels AND a capstone ability could help you with people only taking 5 levels of the class.