Interesting point.
It true that bringing the confession right now would be a little to soon. I still thing that, while she loves Naruto, she wasn't ready to confess. Like you said, the fact that they didn't have real time alone and with Naruto going on training trip could be a good time for Sakura to reflect on everything. Of course, she has the time now if she wish but, I still think that she need to rethink about what happen and see clearly, without any interruption, without any other guilt trip, where she stand now.
Now, for Naruto, he certainly won't think about the confession. Kishi could give a moment that could lead Naruto remembering her confession but, beside that, the only thing that make me believe that NaruSaku has a real chance is if Sakura make another move ( and this time, I hope that she will be ready). It's not that Naruto doesn't loves her because we have recent proof of that but so far, when Naruto did show his affection, it was in a comic way. While he was serious when he was asking her out, he never show any sign that his feeling were deeper then a simple crush to Sakura ( if not, she wouldn't have been surprise when Sai told her that he really do loves her). Of course, at that time ( and even now) he was sure that Sakura still loved Sasuke so that probably why he never tried anything more serious because of that, because he think about her feelings over his ( and he had the chance to prove to Sakura that his feeling for her were deeper then a crush because Sasuke influence wasn't there).
So, in the end, like I said, Sakura will have to make another move to prove that she really hold no romantic feeling for Sasuke and has chosen Naruto.
Naruto is a man of action so, the best way to let him understand is if Sakura give him the kiss we all wish to see

less talking, more action

exactly exactly. It is not that he is afraid to love her or show how he feels he just because he feels she doesn't feel that way about him and wants her to be happy.I believe it has been this way since the hospital scene way the hell back in part one where sakura had shown her concern for sasuke then.It is almost sad to say that he doesn't really believe himself worthy of her. if genuinely shown how she cared about him in a more than friends way I know he would do his best at it just like everything else he does(a kiss would cover this.).
I am happy however that those two have not been resolved yet mainly because sasuke is still between them. Naruto doesn't believe himself to deserve her and there is always the possibility of it being looked at as him being the "second best" if he were to be with her right after that confession. They just need to resolve issues with Sasuke first before they go into this so they can go in with a clean slate and this time apart would be the best thing to push it forward.
To me, kishi has been doing all the right things to push their relationship forward with every little thing he does. And as I am sure I heard on here before and agree with the time apart will let sakura have the time she needs to reflect and realize and basically grow. Now she knows what to expect and can be ready for it.