I've never played Sakura Wars before but if this is similar to Valkyria Chronicles then I'll for sure be interested in it. (as long as it has a PS4 version)
Keep in mind that the battle system of the previous ST games was very primitive and it only had the most basic mechanics of what VC ended up being.
Also the games didn't have any kind of upgrading or level up system.The performance of your unit was affected only by the choices you did in the VN part of the game.
Furthermore all of the games were pretty easy and there is no difficulty to choose from.
Here is a video showing a little bit of the combat.
So you can see that the combat albeit simple it's still fun and one of the most cool aspets of it are the Hissatsu moves which
are like special moves your character can do if he/she fills up a meter.
Here is a video showing most of the Hissatsu in Sakura Wars 3.
Edit:Man, by seeing the Hissatsu again I hope they do them justice in the new again, they are so cool.
Such a great series, so many feelings...