Persistent 1v1 direct access arenas aren’t going to be fun for long - the meta can be solved almost instantly and then all you get os the same ship every time. At lease the cruiser arena that was optionally available in the Abyssal Filaments required balancing PvE and PvP, so it had variety baked into the fits by virtue of requiring PvE survivability before engaging in the PvP content. Direct-to-PvP filaments don’t have this, and it hurts 1v1 arena design when there is no real matchmaking happening.
See this thread for extensive discussion on why 1v1 direct-access arena filaments are a poor development investment choice. Ship class doesn’t change the argument in a meaningful fashion - the considerations for frigates are the same for destroyers, cruisers, etc.
Restoring the post-clear 1v1 cruisers rooms in its original format is something I have consistently supported; re-releasing them as independent content is something I am wholly against.
Edit to add: please split your PvP and PvE content suggestions into separate threads - one concept per thread is the best format for effective discussion.