Mick McMahon and Bellardinelli were amazing, yes. But you have to hand it to the Biz, he revolutionized comics (despite the ever-decreasing quality of painted artwork after it). I read the Horned God first when I was about 14 and I fecking loved it.
If nothing else, as far as Slaine is concerned, it's probably the most accessible artwork for potential 2000ad readers, and the more readers the longer 2000ad lasts.