A Mike, Ihsahn and Garm album album sounds quite a bit more appealing that an Mike, Wilson and Portnoy album to me.
Put me down for the exact opposite of that statement. (not that it wouldn't be pretty freakin' sweet as well, though!) A buddy of mine I went to PN '08 with got to interview Mike for a local indie rock mag (lucky fucker! We had to wait on him for almost an hour while he was on the bus, bastard!), and Mike told him that the project with PORN-Toy (rotfl) & Wilson will definitely happen one day, as soon as they can get their schedules together, which probably isn't looking too good for at least another year or so. But it will happen, so there's something to look forward to!
As for the growl-to-sing ratio on WS, I'm totally fine with it. I've never been a huge fan of Cookie Monster vocals, although Mike probably does it better than just about anyone (along with Chuck Billy), and is just about the only guy (along with Chuck) who comes off sounding more menacing than muppet-like with it to me. Most of the time it just sounds silly to my ears. Don't get me wrong, there are a few other bands I really dig that also go with some degree of growl/scream/sing mixture, (Agalloch, Ihsahn to name a couple) but most of the time I'd
much rather hear someone really SING.
That said, I'd be willing to bet that the ratio on WS is pretty much about where it will stay for the forseeable future. The music has become more prog-oriented, which lends itself better to more clean vocal passages, but the contrast of really well constructed and performed "growling" and singing has always been one of Opeth's biggest hooks, and I'd be very surprised to hear them drop it altogether, nor would I want them to. Bloodbath seems to have pretty much become Mike's outlet for the seriously brutal stuff, so it's not like you can't still have Mike all-brutal, all-the-time, just not in Opeth.
Opeth remains (and always will) a very "heavy" band overall, though, and they are basically defining and setting the standard for a relatively new and very exciting generation of heavy progressive music. I know I'm pretty stoked about being around to witness it, anyway. Bands like Opeth and Porcupine Tree and a few others are what keeps music worth listening to in a world that has been programmed to crave mediocrity and banal, contrived, lifeless garbage. It's comforting to know that as long as bands like Opeth are around, someone will be raising a defiant middle finger to the face of bland, corporate musical... "product".