It's worth noting that one of the code changes he talks about is going to have a big impact on UI:

https://wiki.documentfoundation.org/Development/WidgetLayout

With the previous code, the dialogs couldn't flex or expand, so they had to be sized for the longest translated text. Which, as you can imagine, was not only ugly but poor for usability.

It is now much easier for them to redesign dialogs for UX/UI reasons.