IDK if Tactics is underrated because the people who have played it recognize it as challenging, but probably one of the best RPG's ever made. Underappreciated, as in not talked about by enough gamers/RPG fans, is probably more accurate.

That said, I only believe the game is unbalanced in that towards the end, it's not about Tactics anymore. It's about the luck of me getting in those first few devastating blows before the enemies get their turns and get in their first few devastating blows and win.

Devastating Blows FTW.