Regression in 10.x installer

[bsdprg <bsdprg%disroot.org@localhost>]

I have UEFI system with 5 wedges, 1 is the EFI partition, and Linux 
filesystem and swap are the other 2, and NetBSD FFSv2 and swap are the 
remaining 2.
NetBSD 9.x sysinst correctly identifies the NetBSD wedge and allows me 
to install 9.x on it.
NetBSD 10.x sysinst does not show me the option to install on this 
wedge. Instead it shows only the full disk options and one EFI partition 
as the wedge option.

I have found a couple of issues here:
1. Failure to identify NetBSD FFSv2 wedge as an installable wedge 
option.
2. Misidentification of an EFI partition as an installable wedge option.
3. It incorrectly identifies Linux swap as an FFSv2 wedge.

When I select the whole disk, wd0 in my case, the installer shows me the 
wedges. When I set the NetBSD FFSV2 wedge with installer, boot and newfs 
flags and "okay" the partitioning, the installer goes back to the 
"Install options" screen listing the same options again (listing whole 
disks and one EFI partition) and forgets the saved paritioning settings 
for installation.

So, using the utility menu, I reformatted the FFSV2 wedge by "newfs -O 2 
dk1", but it fails to show up as an installable wedge.

NetBSD 10.0 Beta does even worse. For some strange reason, it deletes 
all wedges (from memory, the disk is intact). So, "dkctl wd0 listwedges" 
does not show anything.

If I install NetBSD 9.3 stable, it lets me install the OS on the dk1 
wedge and asks me whether I want to use the dk2, which is NetBSD swap, 
as the swap partition. And my installation is successful.

Using 10.x installer, I would just upgrade my existing 9.3, but the 
upgrade partially fails (gid component possibly because there is no 
_dhcpcd user in 10.x?). And my upgraded 10x is not usable because 
starting Xorg either using xdm or xinit just shows me a cursor on the 
screen and nothing else. And my Xorg.log does not show any issues.
So, since I am not able to successfully upgrade, I am trying to fresh 
install 10.x