Won't such a book be a great introduction to the period for newcomers? It might well be (depending on the quality of the information therein), but consider that a 'newcomer' purchasing the rules and the supplement together will have to part with £45 in one go. Oh, and by the way the American War of Independence is not included in this supplement - it will have another supplement all to itself. Perhaps in about 3 years time we will be able to purchase a supplement listing all the available supplements.
And finally... Don't be offended by this post if you love supplements and can't wait to buy this one. It's just me sounding off. It's my blog, after all. If I can't be bad tempered and self-righteous here, where else am I going to indulge myself?