Is glissando ease-in and ease-out missing from MS4?

At least I can not find it there. If it is missing, what will happen with scores made with MS3 opened with MS4? Could it explain the poor quality of all glissandos? Is this going to be implemented in MS4? Editing the scores with MS4 might be a bad idea if it deletes these parameters, ease-in and ease-out. If they are preserved in the code the situlation is better.