I agree 100%. It's been years now since Evernote was updated and they have added a ton of fancy features (Tasks, etc.), but not worked on a simple thing as default font and font size. To not have this feature on a NOTE-TAKING APP is very poor, and a reason I'm considering moving to OneNote.
I can set more fonts on this comment on this forum than in my actual notes!
My workaround: I'm still using the app "Evernote Legacy App", which has the old (better) features, until they fix this.