To be fair, we DO have “non-instanced” dungeons “as normal maps”. Maps like Residence of Fallen Legwyn Family, Sicarius. Those are “normal maps” with restrictions like “can’t set up base camp” and what not.
On the other hand, it was made clear that HG would be different from what we already had (that included “normal dungeons”) so you can’t compare HG’s to “normal dungeons”.