Thanks for the information.
To go to Sportpaleis from the station, it's the 12 tramline right?
12 is above ground going through neighbourhoods known for delays, it was the longest line before they chopped it up in 3 lines. I had the old version in my mind.
There are plenty underground trams (2, 3, 6) at Astrid station going to Sport station, less waiting and exiting the station right at the venues without crossing a street.