Does there exist a commentary that explains the basic (if it weren't kabbalah i would say "peshat") of Chaim Vital's Etz Chayim (as opposed to a commentary "al derech ha-derush" which expands or embellishes beyond the simple meaning of the words.) To clarify I'm not talking about a general summary of Kabbalas ha-Ari (e.g. Kelah Pischei Chochma of the Ramchal) but rather a commentary on the actual text of Etz Chayim. (e.g. like the Sulam or Masok m'Dvash on the Zohar).
I think the commentary Beit Lehem Yehuda by Rabbi Yehudah Fetayah fits that description. The author says in the introduction that he wants to provide something like what Rashi provides for people learning Talmud. The commentary aims to be an aid to understanding the words of the text as directly as possible.
A pshat-style commentary on Etz Chaim cannot exist any more than a pshat-style commentary on DNA or on E=mc^2 can: one needs to know more rudimentary aspects of the field before progressing to such advanced material.
[I'm commenting only since I have spent almost two decades learning and teaching Etz Chaim.]