There is a cost to doing nothing as well. Calling them koans potentially has the following effects:

1. Makes people think that rationality is Zen.
2. Makes people think Zen is rational.
3. Irritates people who know/care more about Zen than average.
4. Signals disrespect of specialized knowledge.
5. Encourages a norm of misusing/inflating terms beyond their technical use.

The question is whether it is more costly to make the change or not. How costly is the change? Are the costs long-term or short-term? (The costs of not making the change are mostly long-term.)

Also relevant: Apart from avoiding the above costs, are there benefits to changing it to something else? (For example, a better term could make the articles more interesting and intuitive to beginners than "koan" does.)