It wouldn't be a good ending, especially if the Beyond Netero events were still in place rather than being omitted like in the 2011 anime, but it'd serve as the best cutoff point we have right now if viewing the core thread of the series as Gon trying to find Ging. A lot of character arcs could've been left without continuation without heavily damaging the narrative such as Kurapika already having gained some catharsis at the end of Yorknew, though it cutting off with the opening to this new world of adventure is about as much of a blue balling of the audience as the Toriko manga's ending (the difference being that HxH had potential and good arcs whereas Toriko didn't
).
At the very least, it'd still be more satisfying than the conclusions half of the Battle Shonen type of manga provide (Togashi's previous hit work included), but that's not saying much.