5E multiclassing rules should be relatively easy to implement. Altough multiclassing in 5e isn't as powerful as in 3.5 you can make some interesting characters with it. But in 5e multiclassing is usually less powerful than sticking with a single class. Tough It would be cool if Larian gave names to multiclass combinations, e.g. a Warlock/Paladin becomes a Death Knight or a Rogue/Fighter becomes a Swashbuckler.
