Awesome also about cliches, those are familiar phrases, settings, characters, events that happen in a story. They sometimes seem self-explained because they are familiar, but they just make stories boring. So fill your story with as many unique details as you can, but not irrelevant ones, bring things in for a reason.
Also, playing with sentence length would probably be helpful for you too. Here'a an example I'm sure you will like:
"This sentence has five words. Here are five more words. Five-word sentences are fine. But several together become monotonous. Listen to what is happening. The writing is getting boring. The sound of it drones. It’s like a stuck record. The ear demands some variety. Now listen. I vary the sentence length, and I create music. Music. The writing sings. It has a pleasant rhythm, a lilt, a harmony. I use short sentences. And I use sentences of medium length. And sometimes, when I am certain the reader is rested, I will engage him with a sentence of considerable length, a sentence that burns with energy and builds with all the impetus of a crescendo, the roll of the drums, the crash of the cymbals–sounds that say listen to this, it is important."
Nice story. Although I won't lie sometimes it got really boring. A little cliche. So I have some suggestions.
If you write from diary perspective it will sound better. The conversations will be fully summarized from the point of view of the twins. Also information will be revealed slowly. Nothing extra will be brought in.
Space out your information. There was a huge information dump with Tess describing Skyler.
This twin telepathy should be used more subtly. Like with more eagerness, being careful to get the other to understand, because these are life threatening situations.