I find the newer sound, like what's found on Blackwater Park and Deliverance, to be very awesome. It's not the same thing as most death metal, and as you said it's a little bit less rhythmic. If you compare it to, say, Dark Tranquillity, you can hear the contrast between Opeth's chaotic sound that doesn't really have a pace, because it doesn't have an obvious beat, and DT's fast, aggressive sound. What I mean by this is that Opeth's guitars in the newer albums don't play according to the drums all the time. They play in time, but other than the drum beat, there is less of a rhythm. A riff can ascend or cycle taking a certain amount of beats per chord once and then be played faster again the next time. It certainly has a speed, but because there isn't a drum that goes and dictates when musical events (chord changes, etc) happen, as you can hear in, for example, Lost To Apathy, it feels like you have less to compare too. The music has feeling to it, very much so, but that feeling isn't created by the music getting in your face loudly and quickly. I like the new sound, it's a much more fluid and unique sound.