Yep, I was thinking the same thing in regards to the arc needing a 6th issue. It's a bit of an epic, almost worthy of a movie with its scope. I too would've liked to have seen more of them sneaking around in their disguises, not easy I guess when you have just 20 pages to deal with, and obviously KT wanted to finish that issue with that cliffhanger, so there had to be room for that too.
But the story arc as a whole has been really entertaining so far. It's pretty much had everything.