What you have said about Gundam 00 is absolutely true, particularly compared to its own first season, but fanservice didn't entirely disappear from that series either. It was just more subtle, which is certainly a good thing, but someone who inherently dislikes such things and considers even a small amount to be grossly offensive wouldn't give it a perfect ten either, despite that improvement.
The irony in all this is, precisely, that Gundam 00's second season gave its staff more freedom while the second season of Code Geass did exactly the opposite. Gundam 00 was made with huge business considerations and a specific prime time audience in mind, right from the start. Code Geass began in a late night slot and didn't have to live up to similar demanRAB until its sequel was moved to prime time.
00 didn't have anything to prove anymore, but the Geass staff had to deal with new expectations and even changed their own plans.
To make a long story short, I'd assume Sunrise and Bandai wanted to make Code Geass R2 the next Gundam SEED or Destiny, not the next Gundam 00. In a certain way that actually makes a lot of sense, but it complicated the staff's work in the process and thus the increased amount of fanservice was merely part of a rather misguided attempt to appeal to a similar demographic, teenagers included.
I know you're aware of this, generally speaking, because the issue has come up before...but that was still relevant to the discussion.
Suffice to say that there were quite a few scenes I also found tasteless and tacky...but some of them made more sense in context than others and, just as well, there were also episodes that barely had any. Nevertheless, there was still an overall excess and I'm certainly willing to admit that doing this was a mistake. One of several, in fact, none of which I can ever be fond of.
The thing is...I still managed to remain interested in the better aspects of the show, as foolish as that might or might not seem here.
Could you explain then...exactly what moment did that kill? I'm not trying to praise fanservice or the existence of such scenes, if someone is getting that impression then I must be remarkably unclear...but that entire sequence was being played for laughs. The scene started out from Kallen's perspective and only shifted to that meeting as she ran out of the shower in that towel.
And what's more...objectively speaking, it wasn't even an important meeting. I don't think that really needed to be spelled out.
Was this necessary? No, but I don't see why that specific scene is supposed to be so much worse than anything comparable.