FATA27 ; Except that Wild Life has been adding a lot of feature creep to the game that no one had asked for. Some examples:
-> Three new prototype sex systems, none of which stayed in the game.
=> People have been asking for more tentacle scenes, improvements to the older sex scenes, converting more of the sex scenes to the combo-system (Idle->Foreplay->Main->Climax) and better cumshots (groans, facial animations, more realistic spurts).
-> Guns, Max's playthrough, and Fixed-Angle sex scenes.
=> People have been asking for more melee weapons, more varied melee combat, better bow combat, and a longer Maya demo sequence, and this didn't get done.
=> Then, once Guns were added, there was a lot of requests for ammo counters, better aiming mechanics, better gun feedback and more varied enemy kills, but this didn't get done.
-> Fisher Village.
=> People have been asking for a larger jungle blockout, more depth to interactions in the Apoc Village, more explorable things to find around Apoc and the Beach areas and this didn't get done.
-> A lot of prototype systems that barely work (ie climbing, swimming, crawling, blocking, creature spawning in areas without nav meshes, etc...)
=> People have asked for a better inventory system and easier selection of consumables. Not done yet.
=> People have asked for more clothing options or dying of clothing. Not done yet.
=> There was consumable herbs created, but can't do anything with them.
=> People have asked for save/load. Not done yet.
So, no, they shouldn't port the engine to UE5 just yet. Plus most of the people that ported UDK titles to UE4 really regretted it. Let UE5 work out most of the bugs first.