I have not listened to the new song (never listen to singles, but these next 8 months will be difficult for me).
But what I find very interesting about Harridan are the writing/composing credits: Wilson/Harrison. Gavin seems to aim for more involvement into the compositions than he used to, as most of PT's earlier music was composed by Wilson alone (except for 1-2 tracks per album). I wonder if Gavin was involved in the composition of the other tracks as well. I say this, because almost all songs from the last two Pineapple Thief albums have the credits Soord/Harrison, while the songs from their albums before were written by Soord alone. Meaning, The Pineapple Thief have had Steve Kitch and Jon Sykes as full band members for almost two decades now, and none of them contributed to the compositions (but most likely to the arranging of the songs, which is a contribution that can't be overstated). Then Gavin comes in, is a guest musician on one album and then bam, shares writing credits with Soord on every following song (except for two short ones).
I hope he co-composed the other ones too and I'm very excited to hear what these shared credits contribute to the songs. I read his drumming is very present on this first single already.