meeh

It's a tv show, right? On the show it would made an impression of being a cliche way to adapt a chapter because of the same timing, not to mention it is an episode 9, known for its "omfg" last minutes that are expected. There would be nothing epic about it, unlike in the books. Splitting it was a good call, hope they didn't ruin it, though.

This. Stannis showing up at the end of the episode would have felt like a deja vu for the show watchers, not the "epic reveal", if you think about it.