Montbell just released specs for their updated U.L. Inner down parka, my current go-to 3-season insulation layer.
In short, the parka looks much improved. The down content is ramped up, the fit is tapered and and drawcord has been added to the hood - all good things. The cost is an additional 1.6 oz, but for more warmth, a tighter fit and desirable features (the lack of a hood drawcord on my model is a major objection), the weight is worth it.
However, Will Rietveld's objection to the parka still stands. Compared to the WM Flash jacket (3 oz down fill) and the Nunatak Skaha Plus (5 oz down fill), MB's 2.5 oz of fill (men's medium) looks puny.