Heeeyhey! I think game wise and global wise this is more a Q for Max.
Artwise I wouldnt pick another engine, just a more complex workflow that we have learned in all these years and are applying atm.
Unreal is a great engine either way. Plus all artists and developers and especially the programmers are very skilled in the engine itself, so another engine would require a big new learning curve for all of us.
Yes, all games out there have their own tools and own tricks. This certainly would be nice to always have for any type of game. You can see the workflows and tools in tech demos for games like environment creation tools in Ghost Recon Wildlands and Cyberpunk 2077 its famous integration of Quixel its material library, or the recent Project Titan from SideFX. These tools will take years to develop, but are always a huuuge boost in workflow and technological advancements in the entire game industry.
So, tldr, yes, there are other tools in other games that any developer wants to see being build for any project, or even new tools that will advance a game into becoming a golden standard to other developers out there.