Verse riff is similar to Disconnected , but it's not the same.
Pre-chorus from I, the Mask has nothing to do with the one from the End. Different riff, different tempo, different vocal melody on top. The only thing in common is the pattern of 3 clean singing lines and then 1 screaming line. You can hear clearly the pre-chorus riff from I, The Mask at 20 seconds...it's the same riff later ( wonder when I'll hit the ground...) but not harmonized. They use it more times ( all the tears...) but harmonized again.
Bridge is the weird part. It's not the same riff with ITH, but it gives you the impulsion to sing in your head the bridge from ITH. I can't really explain that.
All in all, Mask is not a rip off from their older songs. It just has a nice ASOP vibe mixed with Battles. The song has grown on me and I really like it!
Voices riff seems much more similar to Borders and Shading or Paralyzed. That bothers me more than the Mask.
I said it before, it is not a matter of laziness. New songs are full of riffs in contrast to Battles. Björn is just stuck in the same patterns and scales and he is in need for fresh ideas.
Finally, if they had copied Jesper's riffs, he wouldn't have approved.