Well as @tjr101 mentioned, what we see is still a spire whether people want to see it as one or not because it’s not just there for transmission purposes. A spire is considered such when it is a part of the design scheme, the antenna on the original North Tower was considered an antenna because it was solely intended/built for transmission purposes.
The spire not having it’s radome anymore didn’t just make it an antenna. The overall design and geometry of it, as you mentioned the beacon housing still has it’s triangular and octagonal geometry as do the intermediate platforms, because the spire had already started construction of it’s components when it was found that the radome would have been impossible/very difficult to upkeep with transmission equipment inside it as well. There was no time to change the design by that point.
I’m sure “something” can still be done to make the spire appear more in its original form even if its just putting an open air lattice arround it, but the radome isn’t an aspect that’s coming back as equipment now installed on the mast is larger than the radome enclosure would have been.