I actually think the spirit of being open to new ideas is more the important point of Kirk's question than the details itself. My answers:
1. The Iron Army. I realize that this would again be revisiting the past. But it would be revisiting the past that was not given much of a chance. I have been collecting Gen. Blitz stuff pretty much as hard as I can because I like the design of the team. IMO, the Iron Army has a flair to it that reminds me of Cobra in 1982, but drawing heavily from WWII Germany for their outfits. They infuse that odd blend of real world and sci-fi with the use of a cyborg army. I did Blitz a little fast in bad lighting, so I missed some spots. But here are two of my customs to give an idea of how I think these characters could look in a current toyline:


2. I am going to agree and disagree. I think new Joes are needed, but retiring the old ones is not a great idea. Over the last decade, when a new character has appeared it is always scrutinized as being a clone of a character that already exists. Hard Drive and Hacker...why not Mainframe? Switch Gears...why not Heavy Metal? Depthcharge...why not Wet-Suit? The truth is, when we were younger we could have been asking these same questions. Sci-Fi...why not Flash? Lifeline...why not Doc? Wet-Suit...why not Torpedo? Heavy Metal...why not Steeler? But the community as a whole was a lot more open to it at the time.
But on the other hand, I have been spouting off about my comparison to Spider-Man for a while now. Snake-Eyes and the Joes we know started being introduced in 1982. Spider-Man debuted in 1962, exactly 20 years earlier. I can remember the feeling of the 82 Joes being introduced. I can also remember at the time how Spider-Man already felt like a staple of our culture in 82. I remember that every kid knew who Spider-Man was. It wasn't that every kid was super excited about the character, but through his ups and downs of popularity he always retained a presence. Spider-Man had attained a cultural saturation that has endured. So ask yourself this....2002 marked 20 years for Snake Eyes. Did that character attain and hold the same kind of cultural saturation that Spider-Man attained? I would say no. Has the G.I.Joe brand as a whole done that?
Despite the combat heroes that were thrust upon him, my 6-year old nephew still didn't know or care what G.I.Joe was the last time I asked him. But he knows Spider-Man. Is it really a safe idea to toss out the work the brand has done in 30 years and start again? I would say no. It is time to take those characters and see to it that they press on and last for the next generation. We won't always be around to cheerlead our childhood heroes on. If we don't pass them on, this really could be the end of the road. And the end of the road for our Joes could also mean the end of all G.I.Joe.
But at the same time, I think we need to grab that open-mindedness message that Kirk was talking about. there really is no reason why Sgt. Savage could not have sat on the shelf next to 3 3/4" Joes and done well. G.I.Joe can be more than just Snake Eyes, Duke, and a supporting cast of familiar faces.