These things would be nice to have:

o get all distros to agree on a default set of rules

o rework rules to a match-action list, instead of a rules array

These things will change in future udev versions:

These things are deprecated and scheduled for removal in a future udev version:

o DEVTYPE for disks is set by the kernel, remove it from the rules

o "udevadm control" commands will only accept the --<command> syntax

o symlink names to udevadm will no longer be resolved to old command names