Hi Steve,
Yes, monohull sailboats are fine enough at the bow that 2-leg snubbers aka bridles don’t help (other than being redundant). But cats and motoryachts seem to get good service from them.
I’m surprised you’re using just 3/8" HT chain on Aruna - I’d have figured you for 1/2" or 9/16" at 45T 
We use 3/8" G40 as it fits our wildcat and seems to work well. The soft shackle we use to attach to the chain uses 1/4" Dyneema for the “ball” and 3/16" for the “noose” section, as getting 1/4" through the chain link was difficult sometimes (my wife usually does the anchoring, while I do the “un-anchoring” Since the failure point of a soft shackle is normally where the lines enter the diamond or button knot, I figure we should be getting more than the 1.75 X line strength formula would imply. With 3/16" at 6000 lb ultimate strength, it seems like this part should not be a failure point, even with the smaller size
I’m sure it wouldn’t work for you, but the on-deck snubber has a couple of features: one, you don’t have a lot of snubber out front to foul the anchor chain; two, the helmsman can see just how much tension is on the snubber - very handy when setting!; and three, the 3-strand nylon makes a soft but distinct thumping noise when it moves through those “rappel rings” under tension. If I’m below and hear the thumping, I know that the load on the anchor is changing.
Hartley
S/V Atsa