I was pretty sure that I've read somewhere that the strays issue is a bug, and they do appear for some players. They don't in my game so I use the mod for that: http://www.modthesims.info/download.php?t=603819 It works pefectly fine for me, so you could be interested @Gelysen :)
On the topic though, some improvements could be nice, but not if they ruin the old saves. As many Simmers, I still play my old saves quite often. Sometimes I even go back to them after long time, rather than creating a new one. I definitely don't want to lose them.