I agree, I thought Wizard's ending was shit. Way too much was happening over a tiny space of time, that none of it had any time to have any sense of purpose or meaning. Honestly with all the stuff that comes out of nowhere, to steal the focus, and vanish again you'd be forgiven for thinking the last ten episodes were from another show entirely, hell some of the characters, most noticeably Beast, were like characters from another show. It was just bad.

A 6/10 sounds about right, yeah. I disagree with some of your criteria, but my overall assessment is about on par. I might bump it up to a 6.5, but that's only because I really, really like Haruto.

The wrap of the series certainly pushed it down a peg for me, as it gave us a glimpse of all the potential the show had, then ripped it violently out of our hands. Why we weren't focusing on Koyomi, the Philosophers Stone, the Sabbat and Fueki's decent into grief sparked madness from the beginning is truly beyond me, as for whatever reason for about forty episodes the show was nothing to do with any of that, then in the last ten or so episodes the show decided it was about all of that, and nothing else. I felt like I was in another show with the same cast.

You know, the more I think about what I said earlier, the more it should have been. Instead of having Haruto have four forms which also had their own upgrade forms, he should have been fire only and each additional wizard sans Beast were given the same suit that looked like Haruto, but related to whatever element they had. It is just overkill and shows the lack of planning Toei had with this show. And then they could have had each of the wizards get their own dragon form, which could combine with Haruto for All Dragon before he upgraded to Infinity. For example, they could have brought in the user of the water ring earlier in the series, and had him be the one who defeated Phoenix (regardless of how awesome his final battle with Haruto was) given he has water as his base. Have Medusa's sister come with, gain the Earth ring, and she defeats Medusa after a really nice build up of why Medusa is weak to the Earth element (she does turn people to stone after all, use that as a weakness). And then have Gremlin be vulnerable to air and be defeated by the Hurricane ring bearer. Wiseman gets defeated via All Dragon while the White Wizard is defeated by Infinity.