Could you have kept the old tank icon but just made it smaller?
I don't know, I just felt that old tank was really symbolic. Like whenever I'd have a chance, I'd take out my keys, that have the NG tank keychain, (which I won in a game jam, that was the first time I ever won anything of value, and was like a highlight of my life) and I'd hold the keychain next to the NG logo.
And that moment would just symbolize how an idea could grow into something and change the world. How what was merely a thought in someone's head is now something I physically hold in my hand, something that is a symbol of creation. An icon of everything by everyone.
Just my thoughts.