I'm having a little trouble understanding your reasoning. In one part you are claiming that Rondo was asking for picks, and that was why they were set for him, yet in another you are saying that they set him picks because he was already playing well. Those two ideas don't mesh well with each other.
One speaks to Rondo's desire to get things done. To not be passive. The other speaks of the consistency at which they were set, about the team's response to Rondo's desire to get things done. I doubt that if he was making poor choices out there they would keep letting him dominate the ball. Facts is that he was making really good choices and decisions out there. He knew it, the team knew it. Just the same as he was looking and asking for picks, the players on the floor had no problem with him being this active since he was playing great, to the point that they themselves starting making picks (even when they weren't appropiate in the flow of the offense). The game is fluid and various factors influence decisions on the floor.
It's like when a shooter is struggling with his shot. Rhythm, amount of touches, shooting form, etc. are factors, and they're also related to one an other. He's shooting bad, the touches decrease because he doesn't have the hot hand, and as a consequence his rhythm and form suffers. There are many things to factor in.
What you also have to focus on is the good things he did without a pick. That should tell you his capabilities. For one that seems to like Rondo as much as you do, you seem to have a poor opinion of the guy. You make it seem as if he were worthless without picks. You know that's not true, I know it's not true. So let's stop with the excuses of Rondo's poor play because of the lack of picks. He can play very well without them, taking people off the dribble and playing inside the 3-point arc. In fact, by doing that alone, the picks will come naturally. I don't think many of the picks that were made last night were from behind the 3-point arc. He was simply making things happen, and things naturally progressed from there.
There's no doubt in my mind, that as far as Rondo goes individually, he really benefits from picks. That's a gurantee. What I always argue is wether it's a good idea for him to do so for the benefit of the team. It all hinges in his decision making. If he's making good choices, well Rondo, have at it to your heart's content. If he's making poor ones, as he had been doing for great portions of this early season and through most of last season's playoffs... hell no. It starts with Rondo doing the things he needs to do, once that is established, things will progress from there. Not the other way around.