To understand Magic-kyun! Renaissance, let's use a metaphor. Picture an ice cream sundae that's topped with your favourite syrup. Now pour another serving of syrup on top and add whipped cream (or marshmallows, sprinkles, chocolate chips; your choice of something sweet). That's what makes Magic-kyun! Renaissance.
Yes, that's exactly how I would describe this show. Like a sundae, it's not a new invention. It meets all the standard criteria of a typical shoujo anime. The extra syrup represents how sweet and cheesy it is. All the while as you savour this sundae, you know you're risking cavities. You know there won't be any surprises and it's going to go as predicted, yet you can't stop watching. You watch this show purely to satisfy your sweet tooth. Nothing more. If you start this series hoping for anything more or something different, you'll be sorely disappointed.
That said, I still give this a solid 7 for the Story because those who appreciate art would understand the "sparkles" that art brings to the world. Some people may complain about the lack of romantic story developing, but you need to treat this like an otome. If you approach it with the right mindset, you'll be happy that the show doesn't force a pairing on you. Plus, every character is delectable in their own right, so that's why this show gets 8 for Characters and the Story is good as is without the explicit pairing.
Almost forgot about the extra toppings (whipped cream/marshmallows/whatever you picked). As if the rest of the sundae won't give you sugar overload, this anime packs in musical numbers sporadically like Glee. Yes, you read that right. (I also wasn't prepared for that when I first started watching.) For some people, this might just be a downright turn-off. I almost dropped it myself, but then the singing isn't horrible. It kind of fits with the show. Personally, I don't think it would've detracted from the show to remove said toppings, but it doesn't completely ruin it either. It's just more (unnecessary) sugar in the end. But, now you've been warned.
Takeaway: Enjoyable anime for those with a sweet tooth who enjoys shoujo anime with otome flair. (NOT for the romantic at heart who needs a definite end game pairing).
Side note: If anyone reads the manga for this show, can you message me to tell me the ending? They didn't publish this in English and I am curious to know how the manga ends.