Currently, it is impossible to access spells at a level higher than a certain class' maximum (for example, level 7 spells on Sword Saint) even though the caster level is at maximum. Also, it appears that Paladin is no longer able to merge with Angel.
Here are a few examples; the game is completely unmodded aside from Spellbook Merge currently. Tested by making quick characters with the Inevitable Access DLC for the sake of speed.

