After all that went on, with Naugus becoming king, Geoffrey's apparent betrayal, Nicole becoming an outcast, the Death Egg attacking New Mobotropolis, fallowed by the Battle Bird Armada destroying the castle; a lot of the Freedom Fighters probably felt really hopeless. And with news of Sally's roboticization, it must've really took a blow to their spirits.
But since Sonic is the strongest and most loyal of the group, he is able to keep up his strength. Unlike the others who are beginning to loose hope in succeeding, Sonic (despite his losses) has the urge to continue the fight and take back what he once held dear.
Yes, I'm aware it did indeed deliver a blow to their spirits.
Still, they just seemed to give up way too easy.
Knuckles didn't even have the excuse of being on the front-lines and suffering harm. He just gave a dumb reason for not helping when Sonic asked.
That's what really made me think Ian didn't want them to attempt to save her at all. When Knuckles, who wasn't fatigued in the least and he too gives a lame excuse, something is DEFINITELY up.

Like Sonic, I feel that we should all keep moving forward and confront anything we may come across. Unfortunately, most fans seem to stick to the past and cry and moan about their "younger years when everything was better", even if times aren't really that different.

Ok, I can agree we should confront anything we may come across...
But, I have to say, the younger years of Sonic were definitely better than the latter. I'm sorry, but it's true.
I know that sounds like stuck in the past thinking, as I've been accused of by some other Sonic fans...

Still, I'm a big believer in, if something is working, don't change it. Modify it somewhat to keep it fresh if necessary, but DON'T EVER change a good thing. It almost always leads to problems.
When I think of what made Sonic a cool series to be a fan of, it's not the new games and stories, but the classics that gave him his luster.
Sonic unfortunately is so different now from the 90's, that it's really quite sad.

It's one reason why I have yet to embrace anything of the modern Sonic and pretty much stick to the classic version of him, both games and comics. He was much better then.
But, that's just my opinion.