if you use fresh pearl onions, i might cut the quantity down to 20 fresh. fresh pearl onions are roughly twice the size of frozen from what i have seen. also note that the cooking time may be 15-20 minutes longer as well.
if you are sensitive to salt, you might be able to get away with skipping the 1/2 teaspoon completely. the better than bouillon i used was not reduced sodium so the dish had plenty of seasoning from that alone.
Find it online: https://www.alldayieat.com/recipe/classic-beef-bourguignon/