the button I want most in my Typing English career: a "yes that's misspelled, correct it to the first suggestion" button.

having to switch to a mouse to click on the spellchecking for every minor word is so tedious

maybe if you hit it again after it applies a correction, it goes to the 2nd most likely suggestion
@foone ...now I wonder if you could just literally apply a Japanese IME to English

tbh I'm pretty sure that's kinda how Mac autocorrect works now (I always disable it though)