So reading a little more into this, I think I have clarity on Macvan vs IPvlan the difference being each host gets a unique virtualized MAC vs having to share with IPvlan. I think the only consequence of IPVlan would be I couldn't have hosts get IPs via DHCP and maybe some layer 2 discovery protocols might be borked, but neither should be an issue in my use case, so I think I'll make the plunge and just switch to IPVlan.
poshmick907ak's post in Problems with Docker/Macvlan and stability - Best practices for direct network exposure of containers? was marked as the answer