Yes, if you want to keep it as a raceway, then the geometry should be made to exclude the northern building. I would suggest area=yes as it means cars can drive in any direction here (which is the case for the show). It is not a oneway directional raceway as many other race courses. area:highway=* has different meaning. tourism=attraction is already on the node https://www.openstreetmap.org/node/13049474745 and I am not sure if to merge it with the whole area (sports_centre) here.

I have changed the area a bit in changeset https://overpass-api.de/achavi/?changeset=172030464 . See if you like it. There is now both the raceway itself and the sports_centre encompassing all the facilities.