Reproducable Version Qualifiers [was #9259]
Tycho 0.16 will offer [reproducable version qualifiers|http://wiki.eclipse.org/Tycho/Reproducible_Version_Qualifiers], i.e. the qualifier part of each plugin is the timestamp of the last commit in that plugin, likewise for features.
This would not only make clearer which version the user actually works on, but it would probably also reduce the size of updates dramatically, hence we should investigate this when 0.16 is released.