I've wanted a replacement for Final Fantasy Tactics forever. That was a really amazing, cerebral game. I think that Advanced Wars is kind of the epitome of this genre, but I'd love to see what they can do.
These games are all about the execution; really easy to overcomplicate the interface.
If you're looking entirely for the gameplay (or if you also enjoy Japanese themes, art, and humor), try the Disgaea games. Vastly better gameplay than FF: Tactics, though the art and tone are almost polar opposites.
Loved Disgaea but I feel like the endgame is too repetitive and boring. Like, in one of the games, if you wanna go to the penguin world you're looking at like 150+ hours of grinding. It's not World of Warcraft you know?
So I guess I'm looking for depth, but not depth for the sake of depth, more like real continuous flow. I liked Disgaea a lot though back in the day.
I remember finding the 'Jobs Menu', but never finding out how to change jobs and focus points in categories until I was half way into the game. It was a ruff experience of mostly pure melee and potions for those first 30 hours.
Final Fantasy Tactics Advance (for GBA) is the spiritual successor. It has a similar job system and gameplay to an extent, but you might consider it easier or even toned down.
Regardless, I think it has a bunch of unique touches for a tactical RPG, and the whole atmosphere of it is really captivating. It's one of those games that come across as an experience beyond a stream of bits, which is something the genre benefits from. It does seem like Massive Chalice would be a similar breath of fresh air, if it ever gets finished.
These games are all about the execution; really easy to overcomplicate the interface.