Unless you have two set ups its going to be loose with them out and tight with them in. I think Rev'it is spot on when it comes to this though. My sand XL jacket is tight with the liners in and pretty good out. I should have gone with a 2xl jacket but oh well.
I have a 3xl off track revit jacket I use in the winter now with all the liners in plus a huge back support. I use to wear it over body armor but it works great in the winter since its so big. I can put lots of layers on under it. The off track vents pretty bad. The sand works way better.