25 years ago it was easy to offend people with the image of metal, as opposed to the images on the shirts. I had the SOD shirt with Speak English or Die on it, and the Morbid Angel shirt with the Dead your god is dead lyrics on the back. I can understand why people get offended and I wont ever stop my kids buying such things but I will warn them against where it's appropriate to wear them.
Dave has said from day one Kiko is the best guitarist Megadeth has ever had and to me that's just looking after what's current. I'd expect him to say that every time a new guitarist comes on board. Imagine how much an arse the new guy in the band would feel if the lead singer told everyone that he was bettered by any one of the previous players. It's a pointless comment but if anything it's probably the sanest thing Dave's said in a long time...it's when he keeps talking that is the problem