If you consider this "awesome" and find "depth" there, I honestly have to ask; and I mean this without meaning to sound patronising, how familiar are you with RPGs? Honestly, this game is painfully simple. The same tactic works for everything. Stay in standard formation till the enemy staggers, switch to an all out attack, when it's counter-attacking turtle up and heal... repeat until dead. Tactic number 2: Get "Army Of One"; Win.
There's no strategy needed outside of the most basic WoW style tank, healer, DPS builds. It's about as cookie cutter as you can get. Now, if you see the many different but ultimately similar powers as depth I suggest you look again. There's no problem solving. No tricky abilities, status elements, elemental attacks etc. to worry about. The game does all that for you. You can beat almost every encounter by simply holding down a button...
If you still like the game, good for you, but I cannot possibly understand why.
I enjoyed the game because I'm able to overcome most games' shortcomings, as long as I can still have fun. In fact, I've enjoyed (in a minor or bigger way) almost every single game I've played.
There's no true objectiveness. A game is not "bad", nor "good", but rather, the opinion you get from the game is what defines how that game is for you. Some people consider The Last of Us to be the greatest game ever made. I think that's a big overstatement. There's far better games out there than that one, yet they can argue why they do consider it to be, and that's okay.
People can say Vampire Rain is a bad game, but I can argue why it is not. Like in Ancient Greek, the power was granted for those who could defend their point beyond any argument, nor whether they were wright or wrong. Think of that Greek guy who said that it was the Earth - not the Sun - the one that moved in orbit. People effectively argued against that point, so he couldn't defend it anymore. Was he wrong? He wasn't.
I'm familiar enough with RPGs...I've played my share of them. Regarding XIII, the same tactic does NOT work for everyone. The Guard Mistress may have low HP, but try COM COM COM despite your characters being overpowered and you might eat dust. You can't stagger all enemies. You can't stagger Vercingetorix, for example, which makes it for a long, intense battle. Healing sometimes isn't the answer; it wasn't certainly with Long Gui. Heal a lot and it just castle Doom on you, so you die.
There's a lot of status to be worried about; especially on those enemies who are inmune to everything yet they can dispel yours. TP played a critical role sometimes (yet the Summons were painfully horrible, so let's obviate that), but not in all cases. There's items to be thrown. There's paradigms to be changed. There's useless formations in one combat that may grace with the victory on another one. And the story and characters may not be the greatest, but I liked Sazh and ultimately was interested in seeing how his character developed throughout the game. So the motivation for me to keep playing was there, in the form of Sazh and Dahj (and Snow and Serah too). I also wanted to see if Barthandeus could trump and defeat the characters, given that I started playing and XIII-2 had already released (dunno how that game fits into the story, though). It wouldn't be the first time an evil guy effectively surpasses the main cast. FF VI.
So this objectively isn't a bad game. It is a game, a game people can or can't like. I did like it. I enjoyed it.