Fairly simple test, with configuration enabling strike. Strike is not being formatted via HTML upon clicking icon. Icon also doesn't activate.
1) Download the AE Manager
2) Enable Strike and save
3) Navigate to a portlet using AE like blogs or
4) Add the word strike into the content section
5) Select the word to bring up the toolbar and use the "S" icon
6) Text isn't formatted
Editor is not formatting text
Note: hiding features is likely to lead to no visibility as to if those features actually work or not.