I think they maybe didn't want to break balance further since we're level 5, and no encounter is above that... (?)
I'm really no expert at multiclass minmaxing, though.
Please don't drift one-sided into minmaxing nonsense. Multiclassing is also great, especially for the RP (e.g. more dialogue possibilities). But this in turn could indeed cause other problems, as Rag suggests including problems with dialogue strings.... I personally don't expect a punctual release anyway.
