The scenes were establishing the tholians have a mind control tech highly effective on the andorians - and used on quite a few andorians in sensitive positions, immediately after Paths of disharmony (and this is only the morsel we got to know so far).
The situation could only be worse for the andorian free-will, a few years afterwards.
And, given that these scenes had no impact on the rest of the books, these scenes are almost certainly dictated from the editorial/etc above, for continuation of the meta-andorian plot-line.
How do you get that from this:
"It has been used successfully on Andorian test subjects." ... "To make those test subjects especially susceptible to suggestion."
In fact, later on in the same scene he even complains about the Andorian ruling council, which seems to me like it paints him as a rogue, and indicates that the ruling council is not under Tholian control.