I want to propose to get rid of all the old themes when phpMyAmin 4.7 arrives.
We should rebuild it from scratch and level it up, like the mhn theme. In my opinion should we have a new experience level where we have all the benefits of the new possibilities as we speak today.
There already is: #12373
And for the record: None of the 4.6 addon themes is compatible with 4.7 right now.