Taking how awful multiclassing in 5e - should be a very low priority for Larian.
Same could be said about most of 5e. It's a very poorly defined and not very well thought out system. Doesn't mean this game can't be better.
I actually love 5e, it brought me back to D&D after being away from it since 2nd Edition.
I think the rules are fine, I just wish we had more of them to lean on (like Multiclassing) from the start to encourage a wide diversity of characters, while still allowing for the fact that it's a video game and not P&P (where you will need a Face and a Rogue no matter what in some combination).