But drummer David Lovering states the band's newest bass player is 'wonderful'
Band release four new tracks, including 'Blue Eyed Hexe'
Shattuck was fired from group in November
Frontman speaks out after replacing Kim Shattuck with Paz Lenchatin
Bass player speaks for first time since leaving US band in November
Lenchatin, who has previously played with Zwan and A Perfect Circle, replaces Kim Shattuck
Band join Arcade Fire and Neutral Milk Hotel on the bill
The Muffs frontwoman calls her brief stint with the band an "amazing experience"
US band will headline London festival on Sunday, June 8