Switching off draft at the start is optimal, but not necessary for most standard starts. I flipped it for a few early ticks when I needed extra gold to explore a few acres, but it had little overall effect on my province. I came out at 610 and could train the 5300 or so soldiers I drafted, plus everything I was drafting afterwards per tick with patriotism.
nwpa means nothing at any stage, and i'll repeat it til the cows go home; but least of all during the early stages of the game, where elites can perform both offensive and defensive duties if you can afford them.