I just downloaded v6.0b demo today to try it out. So I'm not sure if this is a bug or not, but it definately acts different from using DX plugins.
When I use a VST FX and choose to automate a parameter in that plugin and then grab the particular slider in the plugin that I wish to automate, it creates an Undo item for every individual parameter adjustment. It creates so many undo items that when I go to the Undo menu, sometimes it just sits there for a few minutes before it shows all the undo items just to list all the undo items because there's so many. When I use a DX plugin, it creates 1 undo item after I do the same thing to allow me to quickly undo the automation if I don't like what I did. This seems to happen for all VST plugins. I even tried out Izotope Ozone 3 where I have a DX version and a VST version and see the same different behavior. I think I prefer the DX behavior because it allows me to quickly undo the automation I just did if I decide I didn't like it without having to scroll through a gazillion undo items.
When I use a VST FX and choose to automate a parameter in that plugin and then grab the particular slider in the plugin that I wish to automate, it creates an Undo item for every individual parameter adjustment. It creates so many undo items that when I go to the Undo menu, sometimes it just sits there for a few minutes before it shows all the undo items just to list all the undo items because there's so many. When I use a DX plugin, it creates 1 undo item after I do the same thing to allow me to quickly undo the automation if I don't like what I did. This seems to happen for all VST plugins. I even tried out Izotope Ozone 3 where I have a DX version and a VST version and see the same different behavior. I think I prefer the DX behavior because it allows me to quickly undo the automation I just did if I decide I didn't like it without having to scroll through a gazillion undo items.