It seems i didnt check thoroughly, Qt creator is already packaged in that ppa.
https://edge.launchpad.net/~kubuntu-ppa/+archive/beta/+packages?field.name_filter=qtcreator&field.status_filter=published&field.series_filter=
** Changed in: qtcreator (Ubuntu)
Status: In Progress => Fix Released
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qt-creator in (k)ubuntu out of date
https://bugs.launchpad.net/bugs/609276
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