Hi. Nice to be back.
Rockstar, firstly I don’t see how you can compare Rishonei Ashkenaz with something made up within the last 100 years.
Furthermore, the Gemoro itself says that tefillin need a guf noki and also that one may not be meisiach daas while wearing tefillin. It is for both of these reasons that we (at least the vast majority of us) wear tefillin only while davening Shachris even though the original mitzvah was to wear tefillin all day. When it comes to sukkah, however, there is no such caveat and Chazal explicitly say that sleeping is to be done in the sukkah.