I didn't mind that they killed a few older characters off, I just hated the way they did it. I call it the "Hamburger Hill" Approach. (after the movie Hamburger Hill) it goes like this.....
Hi. Meet some guys. (in GI Joes case, meet characters that arent too interesting and we haven't used in a while) and .....BOOM. WATCH 'EM ALL DIE.
You never had to to feel for them. Or get to know them. My reaction was "Shit, now what am I gonna do with my ______ ? (Add figure in blank, Doc, HeavyMetal, etc.)
I hated when DD killed off Flash and MAinFrame, but they did it classy!
I gotta give them that!