This screenshot is quite self describing:
Most important is outlining the text as there is currently no easy way in Kdenlive to achieve this apart from drawing the whole text clip in Gimp or Krita.
In Kino you can outline any font. You can choose color, opacity and size for the outline.
The implementation should not be so hard, there are basically two fonts, the smaller is drawn on top of its "shadow" sibling, which is of the same font but slightly bigger size.
The padding - or semitransparent box under the text - is very usefull too. But there is the way round in Kdenlive right now. Create an PNG with semitransparent box of desired size and position in Gimp, import it to Kdenlive, put it on a separate video track under the text clip. You have to experiment a little bit, as there is another bug in transparent text clip editor making it harder to match positions of the text and the underlaying box. This way is not so flexible as in Kino, especially regarding the rigid size of the imaged box. But at least, there is some way round.
Positioning of text is already more flexible in Kdenlive. So this is OK.
Fading in and fading out can be also achieved in different ways right now.
Cinelerra provides only dropping shadow functionality which is not so effective as semitransparent text outline.