This show certainly deserves higher rating than 7.
For one, all actors in the story pursue their own interests, so there is no inherently evil non-characters.
Then, none of the commanding officers are incompetent in battle tactics. Even in case of silver spoon boy, despite being priory shown as a detestable person, he still implies textbook-class tactics and requires a few ruses to be beaten.
What brings us to the battles. All of them are well thought through, major ones even consist of multiple stages. Also, despite significant role of magic, they still leave a surprisingly realistic impression: the breaks for the night, numbers of troops participating, their equipment, banners, logistics, visuals, finally tactics - everything greatly contributes to the warfare's authentic feel.
Then, goes the magic, which also is handled well here: despite providing an immense power to the user, due to it's exclusivity, it doesn't become some omnipotent force that renders all other types of combat obsolete.
Broadening the scope, we come to the politics. This aspect may not be quite as sophisticated as the battles, but is still competently done.
Lastly, the story of Tigrevurmud, the young earl of Alsace who gets caught in a political turmoil due to power vacuum in the kingdom of Brune is well written and pleasant to follow. All main characters are likable, their actions are coherent and understandable.
In conclusion, it isn't perfect, but at the same time without any major flaws.
P. S. In regards to a supposed lasciviousness of the show, except for the character design, there really isn't much to it. There is barely five or six short humorous or awkward "fan service" scenes, like stumbling on someone in a bath and that's the extent of it. Not sure why people focus on it so much.
