The one-shot is awesome and I really like Mitsuki as a character. Probably the best "young generation" character thus far. However the art for the new Boruto series looks god awful, and I can't say that won't detract from my enjoyment. I'll still give the series a try.
I think the author will learn quickly, from what I can tell this is his first drawing. The most noticeable screw ups are that his faces are much rounder/wider, and the eyes are rounder/squarer than Kishi's typical style. To be fair, they
are children so the proportions of faces
should be generally wider (think Adult Hitsugaya v Child Hitsugaya), and so this author may simply overexaggerate those features compared to Kishi. I think it'll get better.
As for Mitsuki, he's by far one of my favorite characters. Sarada is my first favorite, and Boruto is my second if only because I'm
so curious about him being an anti-hero of the series. If Boruto can display some shades of grey compared to his Father's morality I will be very pleased.
The rest of the kids show their own unique promise, but the one big lacking thing to me is the potential Villain. There's yet to be a villain so far to me conceptually (through the 10-chap sidestory, and the Boruto movie) that don't just seem like Filler villains. Now, to be fair, it's a movie and a mini-series so the villains
should be filler villains, but Naruto built up 400+ chapters of history and lineages. To me, the climax of whtever possible villain
was Kaguya. She was the origin of the earliest known tale. I guess with the right storytelling anything can be pulled off, but I think that he would be best staying with simple political issues.
To me, there's still poor villages, there's still a monetary reward system, there is theoretically a world beyond the continent we saw (possibly) so bringing in those X-factors would be smart IMO. Don't try and create some invincible villain of prophecy, just stay simple with the political and character struggles and try to make it realistic.