[Radek]

I don't think so. Reasons:

1. The multiclass is "penalized" by very slow advancing. Good, you can cast spells, attack with a weapon, hide in shadows, and backstab. But at which level? Your level in each class is low so that your spellcasting is of low efficiency and you cannot cast high level spells, your THAC0 isn't something to write home about, your chance to hide in shadows isn't terrific, and your backstab modifier isn't super, too.
2. Let us compare with a dual class. A dual class is a "serialized" multiclass in some sense. The only differences between a multiclass and a dual class are:
- a dual class cannot benefit from both his classes immediately, and
- a dual class will not advance in his old class.
On the other hand, a dual class gets all his stars. How come?

Well, it's a decision of the game authors and we cannot change it. We can only comment. My comment is: It's unjust! The stars are precious and the multiclass is paying a too high price for being a multiclass. A multiclass should behave like two (or three) characters glued together, that means, a multiclass should gain his benefits from all his classes.