Not sure when an update is coming but a quick rundown of some things that I have adjusted since the last pack.
1) Ready to Fight bar has been raised above the player cards so it no longer will cover parts of the CSPs for most characters.
2) On the stage select screen, colored borders have been placed around every stage to show their current status of Starter/Counter/Banned in tournaments. (Currently based on SOJ's Summer Map Pack) The stage's title has also been colored. Unlike Smash @ Xanadu or other streaming tournaments though, I did not add the words starter/counter/banned to the stage preview as I found that to be a little ugly.
3) A few stages have been added/replaced. No previews yet, but you've probably seen them in other places by now.
Pictochat <- > Splat's Bowser's Castle
Norfair <-> Norfair 2.0
Summer Map Pack versions of Skyloft, Skyworld, Metal Cavern, and Lylat Cruise replace their previous stages.
Pokemon Stadium 1 replaced by Sandfall's Pokemon Stadium Redux V1, using the Fire version.
4) The CSS Character Select Icons for Mewtwo and Roy have been replaced by the ones from Shun_One's Pixel Pack CSS. All others remain the same.
5) A few costumes have been added/replaced, including the CSPs for the costumes.
Samus
Corrupted Phazon Suit <-> Dark Suit
Faux Light Suit <-> Real Light Suit (Though this will be removed/replaced when the next official version of P:M is released)
ZSS
Main and Green colors replaced by Brawl versions of SJS's ZSS v2
Red, Black, and White colors replaced by CBLISS versions of SJS's ZSS v2
Justin Bailey (Zero Mission) costume replaced by Justin Bailey (Metroid) version, also made by SJS.