Colloquial forms (let's...) in articles
In general I don't think it's a big issue but alternatives may look better, here are a few suggestions:


"Let's take a step back" -> "from a broader perspective"; "in a larger context"
"Let's look at the data" -> you don't need this at all, you can just start talking about the data: "the data shows that...", "in the data we observe that..."
"Let's look at the context" -> you don't need it here either: "the context consists of...", "to put this analysis in context, ...."