Not having ACX's Fantastic Children encode is not much of a loss:
1) They cut out the next episode previews (which is especially unfortunate since the TV version didn't have them).
2) They left out the song/sign only subtitle track, making the encodes less useful for anyone who wants to watch FC in English.
3) The English dub sux to high heaven anyway, and this is the opinion of people like
this guy who normally like or even
prefer English dubs.
For Planetes, there was discussion awhile back about uploading the aF version, but IIRC it was decided not to due to wrong aspect ratio. Although I suppose that could be overcome by manually overriding to 16:9.
Not that it matters, but I took a look at ACX's Paradise Kiss, and I wasn't too impressed...jaggies/stairsteps all over the place, IIRC. At least they kept both subtitle tracks in on that one. Guess we'll have to wait for another group to release it...only problem is, I've heard that dual-audio groups have shied away from releasing series like Paradise Kiss and Planetes due to the existence of the HDTV versions.
As for GitS 2nd Gig, imo we should keep LMF's version if KAA's is uploaded, as the wiki/rules do allow for it. Supposedly LMF's release is extremely good, according to the AniDB comments, and it would be a shame to lose it.