Well, Mike's a very positive guy, so reading this is kind of surprising. I don't think he's going to quit DT anytime soon, but he's writing his own solo music and wants to offer more than just play the drums for the band. I definitely want him to get more songwriting opportunities on the next DT album, but, with the IAW 25th anniversary tour coming up, he's going to be playing lots of music from before he got in the band and the next album might be delayed to late 2018 or even 2019, depending on how much they tour next year.
Like I said, I don't think he's considering to leave the band anytime soon, remember this interview is from more than a month ago, and he's already talked about learning songs for the DT tour next, after this interview. It just wouldn't make sense to start working on all that if he's planning to leave the band at the end of this tour or else.
Also, I would hate to see him leave, while still lots of "fans" don't appreciate all he's brought to the band. And don't get me started on the big pile of "bring Pornoy back" comments waiting to get posted. It just wouldn't be right.