Let's say that, up till Clayman, I don't listen to the album's because of Anders.
It's not as if he's been the shinning or influential part of the band. Ever.
The only album where Anders detracts until 2014, for me is ASOP. He literally ruins that album for me, alongside the shitty production. Personally he's definitely a big part of why I enjoy a lot of the albums until 2011, excluding ASOP. When he could be bothered he wrote really good lyrics, has a unique screaming style which worked really well with the music and had moments where the ProTools worked well with his voice (his cleans on Come Clarity in particuar sound good for the most part). I appreciate him a lot during the pre-2008 period. The guitar work is still the main reason most of us listen to old IF, but Anders played his part in adding positively to the sound.
After SOAPF, though... fucking disaster. Awful on SC. Awful on Battles. Tolerable on ITM. Lyrics in the toilet, cleans somehow getting worse with experience, screams/growls getting weaker and poorer with each release. Again, ITM was a bit of an improvement, but still way too many cleans and Autotune machine BS.