When Echo is hiding behind a wall as Clark is calling for her, she puts her palms lightly to her face to apply war paint. When she removes her palms, the paint covers areas of her face which her palms did not touch and shows horizontal finger marks which could clearly not have been made by her palms.
When they were so short of time, they shouldn't have waited to reach the island in person to stage an entrance and tell Raven about their plan to go up. As the radio was still working then, they could have talked to Raven and told about this plan to go up so that Raven could have whatever she could have in the time they took to drive to reach Raven.
So much for the stories of and hopes about legendary human evolution, humans just didn't do anything in the 100 years. When second Praimfaya strikes, all they used was a bunker that was built 100 years earlier, and a spaceship to take 8 of them to Ark, both were built a 100 years earlier, and Clarke and Madi survived at Island lab that too was built 100 years ago. Abby created night blood, that too used the basic concept and theory of Becca from 100 years ago. that too, they couldn't mass produce not administer to save humanity. So, they achieved nothing at all in the 100 years? Seems the pinnacle of human development was on the day when ELIE had launched nuclear missile, after that, human race took a downward spiral to kill one another.
There is a dramatic scene in which the oxygen tanks of the group in space are all running out because they only hold an hour of oxygen each. However, at no point did Raven or anyone else consider bringing extra oxygen tanks. Because Clarke was planning on going with them, there should be at least one extra tank.