Regarding the Tattoos, apparently according to the Podcast, the Producers told ABC to hype it in this way "A longtime fan mystery will be revealed, and we'll see someone we haven't seen since last season", ABC decided to go with "Three big Mysteries finally revealed". I too never was very interested in his tattoos. The Producers have always said the Tattoos were Matt Fox's (And Charlie's is Dom's) but there would be a story reason for them. There have been a great many posts on the ABC LOSt boards for a very long time with people desperate to find out about them. however, once the episode aired, funnily enough, people were crying "Who would even care about his damned tattoos"
If the Promos hadn't been so overhyped, Cindy and the kids would've been a complete surprise (IE: No spoiler leaks or evidence of them in the promos) and there was a little more about them in the episode, I think this episode would've been much better received by the viewers. I think there should've been some hint from Cindy as to why she was being so cooperative, and what they were there to watch. For example, if they were there to watch the program airing Room 23 (Carl's brainwashing room), I think Cindy should've worked one of the subliminal phrases into conversation, such as "God Loves you as Jacob" or something, or if she was convinced the "Others" were good guys by something, perhaps a little cryptic something hinting at what they said to convince her ("There really is someone much worse on this island, Jack"). Had they done all this, I think the episode could've been pretty good, despite the stupidity of the whole tattoo reveal.
As it is, we are left wondering if Cindy was there to watch in Room 23, to watch jack, or maybe to reinforce her training (or brainwashing) by watching Juliet's trial. I'm not sure it was neccessary to leave us wondering that.