Gentlemen,
While there were many varieties (I once saw a period photograph of a Texan wearing Jaguar-skin britches) the prevailing trend is to portray the average run-of-the-mill soldier. If we all portrayed exceptions and one-of-a-kind soldiers the result would not look very realistic.
Now, sewing machines were a new thing back then, and most original jackets were hand-sewn. The others have mentioned other details that far eclipse my small knowledge.
In my humble opinion it's a decent looking jacket, i.e. mainstream, but not "farby". Were it "farby" it would be pink and have all manner of gewgaws, masonic and scottish emblems hanging off it. Yet everyone defines that hated word differently.
If you are interested in making it more authentic I'd follow the advise offered by Grayrock Volunteer. As a commutation jacket, it's feasible that it COULD have been machine-sewn (I don't know of any specimens that were but its out of my area). Cut also varied on those jackets. As someone who likes to go the extra yard I'd encourage you to make it look as common as possible, but that's up to you. Probably the best thing you could do would be to study as many originals as possible, if only from photographs, so you can see for yourself trends and details.
D.H.
EDIT- forgot to mention about the material- even late in the war kersey was common (in the ANV). The commutation system was an early-war deal, so material is fine in my opinion.
EDIT 2- the jacket photo 101 Combat Vet. showed serves to remind us is another example of some period oddments. The sleeves are "incorrectly" two pieced!