Pretty much just the lack of subclasses. In general, they seem to have fewer decisions to make when they gain levels than standard PC classes. Their gameplay isn't really any less complex, but generally you don't have to (and in fact, can't) think too much about a build. Even more so than other 5e classes, you just write down what you get at the new level, with little to no room to differentiate one example of the class from another.I do think that my feedback for this playtest would be that they could stand to be even more streamlined though. I'd get rid of any resource management at all apart from spells for the spellcaster, and I'd replace the Expert's second Expertise feature with something else, so that all of the decision-making happens at 1st level.