Debian Wheezy experience

We are deploying new Proxmox servers and decided to try Debian 7 (testing). We had some problems with old platform. In particular, Squeeze GRUB is not fresh enough to boot from multipath device and had to be replaced with one from testing. The following issues were discovered with Debian 7:

• Installer gave some strange error during network configuration, however it can be related to missing bnx firmware (awful Debian policy, firmware is in non-free repository)
• QLogic FC adapter also tried to load missing firmware, however the system recognized FC-attached device
• Multipath-tools-boot package is partly broken - it installs /usr/share/initramfs-tools/scripts/init-top/multipath which it seems do nothing, but fails to execute during update-initramfs (so I've just deleted it)
• And last, most annoying issue is absence of perl-suid package in repositories, which prevents Proxmox installation from "deb http://download.proxmox.com/debian squeeze pve"

Last issue was frustrating enough for us to revert to Squeeze with its old but well-known bugs and perculiarities.