not an issue, an opinion. It's appropriate for a 8 kyu challenge.
maybe make the words keep the same order but each one be reversed individually, it's a little too easy as is.
Reversing each word and the sentence is the same as basically reversing the string. Maybe you could ask to reverse the sentence and every other word?
A little nitpicking, all return strings have an ending (!), except for "You can only have an espresso, latte or a decaf now", maybe a . after now.
"You can only have an espresso, latte or a decaf now"
I could try and kumit a translation in C since it's not as simple (still easy) to reverse a string in it. But It would take me some time as I need to figure out how to do random test cases for this one :D
EDIT: also, that extra step that was added later on woud really trip beginners in C.
@adrian.eyre and @daddepledge -- that bug is being fixed now: https://github.com/Codewars/codewars.com/issues/876
Having completed your 3 authored katas, none of them seem to have random test cases so far which are essential to being approved. I would recommend checking this out: https://github.com/codingforeveryone/READMEs/blob/master/codewars/random-test-cases-for-complete-beginners.md
If you are still lost, I am happy to help! :) It's tricky to get your head around but important to your katas.