As mentioned, with BC, you can set crossovers using the AVR's speaker setup manual, but before the recent change, you cannot do it in Dirac Live if you did not buy the BC license. The benefit for doing it directly in BC is that a) the crossover set by DL (regular license) may be more accurate, b) assuming it can be change like BC could, then you can drag it and would be able to set it to numbers other than the fixed 10 Hz intervals, i.e. such as setting it the 75 Hz, and c) more convenient for tweakers, who want to try different crossovers, without going back to the AVR's speaker menu every time a change is made.
The main benefit of the BC license is about
phase optimization between speaker groups and subwoofer groups, that the regular/basic DL version does not do.
@EWL5 , could you please tell us about b), that is, without the BC license, can you change the XO point by dragging with the mouse, say from the XO set by DL from such as 70 to 75 Hz?
In your case, since you would just set it and forget it, then the added feature to set XO by DL is probably no benefits to you, except what I listed as benefit a) above, but that is a "maybe" only, I would say it is not likely that if DL set XO instead of you doing it manually would be better, it could actually be worse. For me though, I prefer to have the option.