What kind of work do you do in studio and what focal lengths do you work with?
Going back to the pancake cameras, they are great! I use an Arca Swiss RM3Di and have no complaints, for architecture and landscape. Small, light and portable; very easy and fast to set up, very stable. The focusing ring on my Arca is super precise.
But for lenses longer then 90mm, it becomes impractical for a few reasons.
The movements provided on the pancake cameras really lend themselves to architecture and normally have a very large amount of movement down (shifting your view up). Movements up and side to side are less generous, but those are not really needed for architecture or landscape. For furniture though, where you are using a long lens and want amble room to shift, the pancake cameras just won't give you that. (The few time I have shot furniture with my Arca, I had to turn it up side down to get enough up shift; kind of annoying to work that way).
Also, the Arca pancake camera only has fine focusing, no course focus. For shooting macro work, this is very annoying, since you need to move the lens much further to focus on closer objects. It can seem like you are spinning that ring forever.
All the pancake cameras move the lens when you focus. This becomes annoying with, again, macro photography since you are moving the lens closer to the object you are focusing on, thus ever increasing the distance you need to have the lens from the back to be in focus. (You are kind of working against yourself.) Also, all pancake cameras will have a limit to how far you can get the lens from the sensor (sort of), thus limiting how close you can get to your subject.
For the longer lenses, all tilts and swings will be more like base tilts and swings, not axil. Also, (I know for the Arca RM3Di) the tilting mechanism is not made to handle front heavy lenses or lenses that need to sit far from the sensor.
If any of these are a problem for you, I would suggest getting a camera with bellows. My girlfriend, who is a food photographer, and I are thinking about sharing the cost of an Arca Swiss M Line 2 for the reasons stated above and keeping it as a studio camera.