Dearest 47, mine are subjective too, don't worry ;-) As for this discussion, I think I've been clear already; you've mentioned bands that I consider mere epigones and that ultimately bore me. Regarding the Prog discussion, Iāll say right away that Maiden are not prog at all; sure, in their career theyāve had some prog elements, and in "Amolad" this fact is more than evident. Therefore, the comparison must be made within the metal realm, of which Maiden, if not āthe,ā are āamongā the founders, at least as we conceive modern Metalānot only did they rewrite it in the early '80s, but they also reinvented it in the second half of that decade with albums like "Somewhere in Time" and "Seventh Son of a Seventh Son," inspiring that array of groups you mentioned.
Regarding compositional flair, I'm sorry, but I don't see it as significant in Opeth; I repeat, they just repeat clichés that aren't theirs, technically very valid, not theirs (this also applies to Mastodon, Meshuggah, etc.). Sure, Iron Maiden also often repeat certain clichés, but at least they are of their own creation. The last three albums of Maiden may be full of references, but they are references from Maiden; groups from the last 15 years in metal do nothing but reference others (the sacred monsters). This is why Metal is stagnating, and this is why I say when I hear people claim that bands like Maiden or Metallica steal the spotlight from others, I feel compelled to suggest a little self-reflection on their creativity.
I care about both of you, but it seems to me that you are evaluating the technical side too much and confusing it with the compositional aspect (which is something else entirely, and anyone with a bit of critical sense can confirm that compositional-wise, Opeth and their metal companions are mere citationists and little more) and especially the emotional and expressive aspects.
I reiterate that this is not a criticism of your tastes, far from it; I just wanted to convey that art is a very personal and complex matter that must be evaluated from many angles, otherwise, there's a risk of mistaking genius for a lack of talent, to quote the great Peter Steele. Bye!