Its hard to really judge what you have done or not done without a good centerline on that tang and wrist area of your stock. Whenever you are working on a stock, and sand, scrape, chisel, or saw off any wood, restore the centerline with a pencil to what remains, so you can keep better control over your work.
Right now, from the picture, it looks like the Left side of the stock is too "fat", and needs some wood removed. How much and where Is impossible without a centerline as a reference. It may be that you will have to inlet that sideplate deeper, and shorten those stock bolts, when you get this done.
I don't think its so important that your wrist be absolutely round in cross section. Many of them were oval, in cross section, giving the appearance of being much thinner when viewed from the side. The width of the oval comes off the point of that lock panel , and is feathered out towards the back of the wrist.