Yeah a little bit rushed, but I think Yabuki intention was to not repeat the two moments between Hiro and zero two in the episodes 13-14-15 , just this.
Regarding the pacing, remember that the original plot is the anime, so in the manga the story can't be too much deep or different, they already changed a lot (luckily), I only hope they will change and add more details to the ending.
The problem is that the next chapter is scheduled to be released on 15 December...1 month >.<