Is Rondo good enough to be your first option on a championship team? I doubt anyone would say yes to that question. I would say that about Chris Paul though.
You need at least one superstar player to win a championship in this league. While Rondo is a very good player he is not a superstar as of yet. You are basically banking on him continuing to develop over a proven player like Paul.
If Ainge sticks with Rondo the question will be who does he team him with after this season? If Ainge strikes out the C's could very well be looking at mediocrity once again. If you can get Paul and Howard you gotta do it.
Wait, you said Rondo needed to be the first option, so we needed Chris Paul, but now you say we need Dwight Howard, so we don't need Chris Paul to be the first option...
Basically, I think you need to rethink your notion of basketball strategy. Let's take a journey through Celtics and NBA history, looking at some cornerstone players. Was Bob Cousy the first option? No. Was Bill Russell the first option? No. Was Dave Cowens the first option? No. Was Wes Unseld the first option? No. Was Bill Walton the first option? No. Was Larry Bird the first option? Yes. Was Magic Johnson the first option? No. Was Isaiah Thomas the first option? No. Was Kevin Garnet the first option when he came to the Cs? I don't think so. Etc..
Sometimes cornerstone players are the top scoring options on their teams, often they are not.
A cornerstone player is almost always someone with a vision and passion that transcends what other players have. It's not something that can be measured. Rondo has it.
It's true that he's not quite a superstar, and Paul is. So keeping Rondo is, to an extent, an act of faith. But the only thing that is keeping Rondo from that status is consistency. Improved shooting would enhance his game even more, but consistency is the real key. So yes, it takes a degree of faith to commit to Rondo being the future of the Celtics. That's exactly what you need to build a champion. There has to be a leap of faith in there somewhere. There has to be a commitment by the team to a player. It's clear that Rondo should be that player, and that Ainge should take the leap of faith, but if Ainge isn't feeling it, he should trade Rondo and stop screwing around.
We don't need Paul. We have a great point guard, one that I think is arguably already as good as Paul and could be much better. A new point guard is precisely what we don't need. The obsession with trading Rondo is, flatly, ridiculous.