I have to admit I'm a bit wary about the "highest level of skill" thing because I think Platinum Era Momusu also had a very high level of skill - it's just that they lacked promo, fresh members, they weren't focusing on a certain type of choreography and maybe the songs weren't as 'mainstream friendly'... Purely skill-wise I don't really doubt Platinum Era's abilities to pull off what the current MM is doing. Things were dumbed down a bit when 9th gen joined (Maji de suka ska) and 10th gen (Pyoko Pyoko Ultra), but both generations had to get pretty serious pretty fast, largely trained by the members remaining from the Platinum Era that had grown into complete professionals by then and were able to demand the newbies to rise to their level, and beyond... The newbies have done an amazing job improving their dancing and other performance skills, but if you noticed, senior members Aichan, Gakisan, Reina and Sayumin had evidently no trouble adapting to this new style despite the fact that back when they joined, MM was a completely different unit that it is today. That imo speaks volumes of how MM has been pretty badass for a while so that the 5kis and 6kis could develop into performers who could effortlessly switch from one style to the next, and just didn't have a chance to show it to Japan as a whole. There's this strange gap between Golden Era and today's Morning Musume despite the fact that important progress happened in between, again in my opinion.
Shortly put, I don't want to undermine older Momusu by praising the current Momusu! It does feel good to hear any and all praise, but the group has had a high level for a while and in part it's the leadership of the older members that lead the group as a whole here (of course I know there are dance teachers and other staff, but the ones constantly offering advice are the senpais). It feels funny that the public idea seems to be that Momusu was really awesome at first, then got really lame, and now is getting awesome again skill-wise, when I think it's more like... Momusu started as a vocal group with little focus on dancing, then vocals became a little less important, fun dances were added and they exploded in popularity; then the promotions started dropping, but slowly there started being more focus on skills which I think culminated in the Platinum Era that could both dance and sing well; now promo is rising again with the group having really high skill in dancing, so the level of promo+skill are finally meeting again.
Uhhhuuu in a way MM has always had high skill, but the areas of the high skill have shifted, perhaps from vocal -> entertainment -> (underrated) pop artist -> dancing. It feels awesome to see the current MM get praised, but at the same time it's bittersweet because I think already members like Eri Kamei would've deserved it
Fuck this post is a rambling mess, but I'm spending too much trying to fix it so yeah POINT IS MORNING MUSUME FOREVER