Well, I'm a few episodes past MagiShine's debut, and I've gotta say that he's well portrayed. he doesn't steal the spotlight from the Ozu siblings, nor is he overplayed. He comes off as relaxed, aloof, and a pretty nice guy on his down time, but a very serious teacher who honestly cares for his students, and he seems to strike a balance in his teaching methods, specifically giving them lessons and instruction, but also giving them room to use his words to figure things out for themselves, so he so far makes for a good mentor character.
Additionally, I like the way he fights as MagiShine, it's a very subtle and in-control sort of fighting style that can be flashy thanks to his spells and MagiLamp Buster, but not showoff-ish, and Travelion is quite the powerhouse that can really pack a pucnh in comparison to the lithe MagiKing who mostly fights using swordplay and spells. It also helps that I really like the desings used for the things centered around MagiShine(meaning his changer, suit, weapon, and mecha)
Smoky also makes a nice foil to him. Greedy and selfish, but not in a way that's despicable. He's definitely get an attitude, and is quite the cheeky cat from what I've seen
He'll probably go down as one of my favorite sixth rangers by series end, because he defintely comes off as well-handled