That cannot be true as guard has so high passive resist, longer reach and bubble.
by not getting constantly cc locked it is much easier to get away from taking dmg, longer reach helps u avoid aoe splashes.
Necro has all of its feats garbage outdated too, does not make the class bad. Guard is best tank for flag, and still best tank to hunt down cloth, light / rangers. Sure its boring and lacks some interesting abilities, But straight buff for him would just make any cloth armors life more hell than it currently is.
Its rarely good idea just to straight out buff something, without trading something away. if you are suggesting things to balance around guard, suggest some nerfs too