I also think the rocket launcher on the topmost floor (the one above the columns) allows for too much rocket spam on players on both the columns and ground floor; the YA area is located at a greater distance, so there should be no big issue. The lighting could have been significantly brighter as well.
Lack of bot support is also a rather discouraging factor in 2024, and the mapname is more questionable than not. I noticed a wordplay in the name, not exactly sure if it was intentional, but it's possible that '6ex' stands for "ex-DM6", so a reworked version of Q3DM6. However, I'm inclined to think it was not completely necessary.