Re: Stock features
The only things this stock has to do is fit you. Whatever you like, is fine. I build most of my own stocks and really like thumbhole grips. Length of pull, check rest, is all sized to fit me on the bench.
Richards Microfit has some very nice designs. Have a look for a shape that pleases your eye then if possible, try different stocks to see which fits your body shape and style of shooting. Adjust accordingly.
The only suggestion I will give is to make the foreend and butt as close to parallel and flat as possible. This will help ride the bags better. If doing more bipod/rear hand support, then a angled butt is better ie tactical style stocks.
Stocks are where custom really is custom.