Please see this reddit post for the initial pattern of opinions (wasn't sure, if I'm just using it wrong):
https://www.reddit.com/r/zabbix/comments/suqitc/what_bothers_me_about_the_new_hostview_modal/

After doing my first steps in ZABBIX 6.0, I recognized the new modal, which is used for basic host configuration. It's getting used, when I click on Host context menu -> configuration, when I go to Configuration/Hosts -> Create host and when I click on a Host in Configuration/Hosts.

The thing that really bothered me, is the missing option to actually configure host items, triggers and so on. This is for me and many others the by far most happening use case. 
So it seems that - whilst trying to create a better user experience (I really appreciate that) - you actually kind of ruined it for a group of people.

In comparison v5 host view:

... to v6 host view:

The idea to improve this for our use case would be either carrying on hyperlinks in this view, or a user setting, where the user can decide, if he wants to use that feature.