[filmixer]

The easy way to put a glide at a severe automation change is to use "Clear Special" in the Edit menu. Make a selection over the change the length you want the glide to be. Select "Clear Special>All automation". In your case, you might just want to select Plug-In Automation. This will put new break points at the beginning and end of the selection and ramp the automation between the two. I should add that, depending on your computer's power, writing glides over many channels at the same time with big plugins can tax the system quickly.