No, because it is tied to the plugin and it has to be launched manually (or else can break other games, maybe, or at least have unintended side-effects).
No, because it is a limit of the 3DS to be only able to use one plugin at a time. And the patches are built into the plugin. So another plugin cannot be used at the same time.
Because it hasnāt been reverse engineered yet. The reason pretendo adds features and games in small amounts (like not adding the dream suite on acnl) is because reverse engineering, reimplementing, bug testing, and deploying software is very hard