Hi etchot,
We are sorry for the confusion about the change log.
Actually, the T3 v1.4.2 is only released on JoomlArt site and it only contains some bug fixes for Joomla 3.2 as my colleague has told you.
Those change log only apply to github commits and it has not been merged to the release package of T3 v1.4.2 (JoomlArt).
For now, the github latest stable version is v1.4.3, bypasses the v1.4.2 and yes, it will contains all features, improvement, bug fixes of v1.4.2.
T3 v1.4.2 on JoomlArt version may not contains those changes as the change log in github.
Thanks for understanding.
Regards