The most frustrating thing about the Blackhawks’ sputtering start to the season — they fell back to .500 with Saturday’s 7-5 loss to the Devils — hasn’t been the putrid power play or the frequent first-period flops. It wasn’t the monthlong scoring drought they finally snapped out of. It’s how little there is to do about any of it. Do the Hawks need another top-four defenseman? Absolutely. But name a team that couldn’t use one — and try to find one who’s already available in November. Never mind all the no-trade clauses on the Hawks’ roster. Do the Hawks need an injection of speed and energy from Rockford? Maybe. But whom do you send down, who can clear waivers, and who can really make a dent?