I'm pretty liberal with my ideas about what makes a band a band...in that a lot of players are replaceable. I was a little curious about the last incarnation of this (with Sykes), but still, then and now I have to say - No Phil = no Thin Lizzy. It's like the Jimi Hendrix Experience minus Jimi. Just my two cents. I'm a HUGE Lizzy fan, even the older/one guitarist stuff...but at the end of the day I'm really more of a Phil Lynott fan, because he WAS that band.
Also, Vivian Campbell? I have no particular problem with him, but obviously this is just a kind of summer band I guess?