Potential for plug oiling is a fair point with 2-strokes when run near tickover for extended periods. I believe they prefer to run hard, with the accompanying noise. I usually ran my old Evinrude 4 2s around half-throttle so can't add anything more.
I bought our Tohatsu 15 4s for quieter long river trips, with the clout to cover occasional coastal use. It's lovely and quiet and I couldn't be happier with my decision, despite the substantial extra weight.