Thanks for the help and examples on how I could approach this.
I have to say though, having everything running at once with just minimal optimizations, works out pretty well on my end at least.
I just find it a little disappointing that there's no further use for the loader layout feature,
as I think it would be a nice to use it as some sort of additional parameter for cases like these.
(It would look like this to be more precise: Go To * Layout + Use loader layout = True/False).
I know we all "hate" loading screens and I guess the most people like the loading system as it is right now.
In my point of view loading screens make games look more professional and make the games feel more responsive but that is a topic for a different day.