I second the missing exposure of bConstrainAspectRatio. Additionally the ability to disallow nanite seems very crucial from a totally different perspective. This platform is enforcing Nanite, however it also requires the creators to publish to all sorts of platforms including low end devices / mobile which do not even have Nanite support. This way creators are forced to do an odd dance between dealing with nanite created overhead and also making all custom meshes having proper LOD levels or it will impact performance on low end devices. If disallowing nanite will not stay, then we should have an option to restrict our experiences to nanite only platforms. It‘s extremely inconvenient to be forced to deal with all these platform related nuances while also having our hands tight on the engine level knobs we could turn in order to optimize and balance the final products.
If anything Epic should just hide all these features for the regular creators and set them to proper defaults, but permit an opt-in for advanced creators to unhide and these features.