This is not a new conversation. It's been on and off for years. Zul Logoth, River's Rest, Solhaven - all of them have major level gaps that prevent you from being able to make that your home.
Teras recently had their level gap addressed with an incredibly half-hearted attempt to give the island a level 80-90 hunting ground. Two creatures are introduced, one of them is actually a new creature (Steam Dervish) with some interesting elements. Hamstring, steam flaring equipment that vanishes if you touch it, but it has the stupid fire mage retribution ability - except in steam damage instead of fire damage (probably the only place steam resistance via 620 is useful). The other creature is just a higher level skayl, which is still super annoying and spams earthen fury.
Zul Logoth has levels 46+ missing. It would take a massive amount of development to fill the gaps, so total pipe dream. Putting in a high level area would be enjoyable, and I'd vote it be a capped grimswarm hunting area since you cannot open a warcamp within the zone (there are no warcamps in between the carts in Zul's hunting grounds).
My suggestion would be a new area accessed at the center of the Czeroth Caverns. You'd be cave splunking, need 60+ climbing skill, with lots of falling options. No teleporting into the area, of course, but you can gold ring - return - 130 - 740 - 930 (etc) out. Climbing skill checks similar to the swim into Nelemar. Yes, it's still a PITA to get into the hunting area, but there's some undead so you can symbol seek if you're in Voln. Within the hunting ground you have to avoid rockslides and debris falling from the caverns via survival checks (usually just minor injuries, but zero training can lead to death).
Creatures inside:
- High level undead Grutik. Warriors, Priests, and Wizards.
- Bats with warcries (and skins).
- Roa'ter-like creatures that burrow and can swallow you like a roa'ter.
- Greater Krynch with all it's boulder-like behavior, and skins for an opal with a blunt weapon.
- Veaba which is basically a giant centipede?
The creatures aren't all that difficult to develop. They're just reskins of existing creatures with higher levels and skills. It's making the rooms, adding in the entrance mechanics, and making the area challenging that prevents anyone from starting the effort...
At the end of the day, Simu's official response will be that "Every area has access to the Elemental Confluence, thus all cities are capable of capped hunting".