Not really, depending how you set it up. I use to run in type 2 mode - but what was the point to running a full OS on the hardware when the hardware was just for VMs – made no sense from resource sense. Anything I wanted to do on the host OS, just do in a VM.
You do run a more of risk I would think of exposing the host to public, if for some reason you put an IP on the interface on the host that you have setup for public side pfsense wan, etc.
There is one thing if your playing with a couple of vms on your desktop, and that is the only hardware you have, etc. Sure you can run your vms in type 2 setup. But if you have hardware your going to run VMs on only, etc. Why in the world would you not run type 1?? Your just throwing away cpu cycles that could go to VMs on the Host OS.