Space_Flower said:
You're confusing attention to detail with weak storytelling. Esuno Sakae has been hinting at this revelation and building it up for many chapters. You only saw this coming because of what info Esuno-sensei has given us.
You were able to predict this because of two sets of info given to us. The first is that the two Yuno's are both genuine. The second is that the concept of time-travel to the past was introduced to us before.
Weak plot would be to throw in the time-travel concept after this chapter which force the revelation to make sense. Most shounen do this--battle manga is fraught with it. Esuno shows professional storytelling by feeding us the concept and familiarizing us with it -before- introducing a major plot twist that relies on the concept.
This isn't a weak manga where the plot twists and winds with reckless abandon. Rather, you can tell that the mangaka crafted the plot with care in the beginning.
A good twist shouldn't get overshadowed by the heroine's tits. What the author needs to do is give the readers all the necessary info without them noticing, then put it together in a shocking way. And failing that, they at least shouldn't drop so many hints and delay the revelation so much, the audience starts to doubt the twist they're not even meant to expect. Then it just feels horribly anticlimactic when it happens anyway. It's not good writing just because it makes sense, that should be a given.
I liked the chapter regardless, but I'm really hoping there's an actual twist waiting somewhere down the road.