If I had to choose between multiclassing and feats. I would choose feats EVERY time. They allow me as a player to build most character concepts when paired with subclasses. But I would say that certain character concepts are VERY difficult to pull off without multiclassing (even with the existance of subclasses). So I would still like to see multiclassing available in BG3. Also, multiclassing would allow for even greater customization of Origin characters.
