We checked out the sample games and kits page a few days back. The new release no longer has issues with these, but we did a light update anyways, so new users aren't asked to upgrade the format of those samples.
We have different plans for Forge, but at a minimum, we should take down non-compliant content.
3.4 has no target release date. Instead, we'll continue the new pattern of dropping smaller maintenance releases (that in reality are snapshots of the current private release).