Some of the spells just don't feel right. They feel like they should be a ritual. For example, Continual Light. I really feel that the continual light aspect of the spell should be a ritual version of a simple Light spell (which can be cast with an action to produce light fo X number of rounds). Comprehend Languages also feels like it should have some sort of ritual version... probably the exact same effect but with a GP cost, for those who need to be able to cast it on the fly (but did not memorize it on any given morning).