The Ubuntu-style "@" are only needed by Timeshift. If Garuda gets rid of Timeshift I would be happy. The same purpose could be filled within Garuda Assistant, it already has a btrfs category.
for updates, a garuda-hook for btrfs snapshot would be enough, no need of Timeshift-autosnap. Timeshift is designed with Ubuntu in mind, it has its own limitation of taking snapshot, that is "@" and "@home".
If Garuda gets rid of Timeshift, this problem would vanish. A few more buttons in Garuda Assistant could make Timeshift-independent.