Guys, I am not sure if I am following. The spelling check does not exist in the context menu (so-called right click menu). The reason for this thread is b/c for any spelling check you need to stop typing, move your pointer over to the misspelled word, do a left click and then click on the correct spelling. This is a significant pitfall which, personally, reduces my typing and spell checking by quite a large magnitude. Not convenient at all.
In the previous version, the spelling check did exist in the context menu, and there is a context menu key in every keyboard which helps with doing the spell check without interrupting your typing significantly. basically all done by keyboard only (arrow keys to the mis-spelled word + context menu key and typically the first suggestion is already the right wording to pick).
Anyhow, not within my patience span. So, thank you for the update but no I prefer the older version.
Any modification that requires using the mouse instead of the keyboard is a step backward, in my opinion. The classic version of Outlook will remain the better choice for me as well, in a foreseeable future.
You should post feedback using Help > Feedback in the new Outlook, before you uninstall it.