It would have been best written in a more concise way as it does tend to ramble.
I came across this sentence in Collins dictionary. I'm not sure what the sentence is trying to convey. The author uses the conjunction word as to connect the two clauses "It would have been best written in a more concise way" and "it does tend to ramble". But the two seem to be irrelevant. I am kind of lost here. Any thought?