Saw Opeth at the sweden rock festival this year, and I can't say i remember Mike having that much problems with The moor, though I bet it isn't easy.
One of the most difficult songs to sing while playing must be "In my time of need". At least the "I- can't- see- the- mea- -ning...etc." part...
...or a complete different, greater sound than every other record they've made! ;)
That wouldn't be too much to ask for i suppose...?
Anyway, no touring/festival-gigs comming up? You just GOT to play on Sweden Rock Festival next year!