Some 5e Classes need Re-works within the feat system

I am currently running Fenix for my campaign and one glaring issue I have noticed has to do with the new class progression and features. I was absolutely ecstatic when feats and class features were added to F&F, but it seems some of the standard D&D 5e classes have been executed poorly within the new system. For example, one of the Paladin’s strongest early level features is divine smite. Right now, the feat tells the player their character has access to the divine smite spell, but nowhere does it detail what the divine smite spell actually does. This makes the feat useless as Franz does not understand what to actually do for it, and it gets really old to have to explain the effect every time I want to use it.