[sunny3]

My $0.02: "You are complicating this" is an accusation of the recipient. In my opinion, offering the alternative you see as simpler can make the dialogue more productive, e.g., have you considered y? It's simpler because abc... and also achieves the same objective. How did you arrive at this solution? This also saves your own face if/when it turns out things are indeed more complicated than you originally thought.