I totally get, what you mean, cause I kinda feel the same way. I'm quite new in here, so I was not sure, if I dared to come clear with my thoughts, cause some people might bash me or put me in the 'play classics'-box (though I don't see myself there). I appreciate that Maiden are still around and I accept that they grow older and focus on other elements in their music, but I can't help but thinking that some songs could have been so much better, if they had been held as tight as in the eighties. Ups, there I said it. I do belong to the 'play classics'. Hell no, I don't.
I have really struggled with especially Final Frontier and Book Of Souls, but I have given them tons of spinns, so it's not like I don't try. They just don't hit me as hard as their earlier stuff. I'm as excited as can be every time a new album is in the make, but often I end up being disappointed. However, some songs grow on me over time, but it usually takes years.
I hope for the best best for Senjutsu, but tomorrow I'll know.