well, many people strongly disagree to my opinion, but for me Philthy is/was the best drummer Motörhead ever had.
Sure, Mikkey is a much better drummer, from a technical point of view. But Philthys rumbling sound (compare Overkill on NSTH with current recordings!) was fitting Motörhead songs and sound perfectly well!
Anyway, I hope he'll be okay, soon! I always liked that guy, don't know why