Hey Slavical!
Sounds good, looking forward to seeing it. =)
I’ve had to use complex as simple on occasion due to a bug with collision in 4.16 and 4.17 where it doesn’t always work properly. There was no clear indication of why, and often times it would be random. (i.e. it’d work fine at first, then upon reimport if I modified the actual mesh it would stop working. Then even updating collision from the ground up wouldn’t reflect changes in engine.) The creation of the collision isn’t difficult at all, and if I’m not mistaken upon export you should have the original simple collision exported alongside it. The tricky thing is whether UE4 bugs it upon import. I haven’t experienced this issue in a project I’m working on in 4.20 but back when I was working on UE4 products one thing I always heard/read from customers was they wanted as early a supported version as possible which is why I stuck with 4.16 as my usual base version.
But to answer your question it shouldn’t be difficult. Oddly enough I believe I’ve had that bug happen to the stairs in Command Center too, and had to ultimately use Complex as Simple in there as well.
Shoot me a PM if the original collision doesn’t export with the asset when you try to export it BTW.