I love good starship renders. This one is really appealing to me. I think primarily because I'm a big fan of Starfire (both the game and the David Webber & Steve White novels that are based on it.)
And since I see this ship in that light, being a battleship is just the right classification for the size it appears to be. I base that on what looks like an assault shuttle leaving a hangar/boat bay in the picture. This is because in Starfire, ship sizes are based on the number of "hull spaces" (volume) that it contains (for adding in drive systems, weapons, defensive systems, crew quarters, hangar bays, cargo holds, etc.) For example, destroyers in SF range between 21 and 30 hull spaces, battleships range between 81 and 100 HS and large carriers range between 101 and 130 HS.
Plus, I can easily imagine the Starfire weapon systems this battleship mounts by the excellent detail in this picture.
Very good work sir. I really hope you do more starships in the future.