Well, I think there are many good examples of how cut scenes are well done and actually make the game a better game. If I think on cut scenes I don't think on Uncharted 4 where you often can put away your joypad for a long time, take it back for a minute, only to put it away for a long time again. (Don't get me wrong, Uncharted 4 is a great game but it's obviously a very different game than Metroid). I just think that until the HD generation, cut scenes where kind of mehh (with some exceptions) and they would have made a disservice to the Metroid Prime Trilogy (well there are some cut scenes but they were clearly and consciously held to a minimum). But technology has moved on since, nowadays, cut scenes are made in in-game graphics usually which harmonize them much more with the rest of the game than if they are pumped up CGI. Certainly, we love and play Metroid first and foremost for its great gameplay and atmosphere (which includes graphics, sound and music). With well placed and dosed cut scenes it will just improve the atmosphere and the overall experience.
Yeah but what you're saying right now is very different from what I'd call a "heavy cinematic flair", as you put it earlier. To me "heavy cinematic flair" means the whole game will be centered around it, that means cutscenes everywhere and "cinematic gameplay" when not on cutscenes and stuff like that. Think God of War, and such.
By the way, there have been Metroid games with cutscenes in the past, and it wasn't just Other M. Prime 3 had them too, they tried going more "cinematic" with it in trying to tell a more comprehensive story, and in my opinion, failed atrociously. The story drags Prime 3 down so much. That isn't to say Metroid games can't have good stories, but it's only worked once (Fusion) out of the three times they tried putting more emphasis on it, and that shows they're just not that good at making story-centric games, which also isn't to say a game has to be story-centric for its story to be any good, as I'd say Super Metroid has one of the best stories in the series and nearly all of it is told in subtle ways that don't involve any dialogue or cutscenes.
Personally, that's the kind of story I'd want from a Prime 4, but, I'm not expecting it. Prime 1 was quite a letdown story-wise to me (scan logs were great for lore and world-building, but the events you took part in yourself didn't really have much going on), and from then it never really got any better with Retro's next games, even though they did increasingly try to do the storytelling stuff with the Prime series.