If more stars mean a higher max level, then shouldn't there be a difference in max level between the 3 star talents and the 1 star talents? Kurena (Swordmaster) is a 3 star talent while Dogora (Ax Wielding) is a 1 star talent, but they both seem to have the same level cap of 60. The MC also said that, in chapter 34, that the hero is also still at level 60. I guess the hero could be lying because we've never seen his actual level (to my recollection). However, I still feel like that's a bit cheap if the MC is the only person able to break away from the level 60 ceiling because of his stars seeing as the stars don't seem to affect the other character's level caps in any way.
Yeah, I guess that's true, depending on what the definition of a guard break is. In my opinion, guard breaking sounds like literally breaking a gaurd - fighting game style. Wouldn't be too surprised if guard breaking extends to armor, I guess.