Then it's interresting. You can see some mapping error and discutable decisions in the making of thoose levels. There is still some mapping errors in the QL versions.

In regards to the discutable decisions it is most of the time about player clip/invisible walls. making the map too simple and more restrictive in terms of tricks/movement. I know invisible walls is good to avoid players camping corners but that's it.

Yes mate, they are from id, came with an old version of GTKRadiant. But they are bit buggy with ql.

Are they realy original from idsoftware or you decompiled it?