This is a description and review of the new V5 interface when playing sentences. I have tested this by playing sentences using the vocabulary option with text input method, and for a few sentences I have then also chosen the multiple-choice option to note any changes therein. I have not tested the listening or speaking options.
The first change with the new interface when clicking “Play” (or “Review”) is to the Play Options dialogue -
I personally think that is an improvement, even though it is mostly aesthetic changes.
I note that Text Input is no longer classed as “Difficult” but is now merely “Hard” 
. I’m still not convinced that calling Multiple Choice “Easy” is a good idea, as someone who doesn’t find that to be easy could be discouraged by that choice of word (“I can’t even do the easy thing, I’d better give up now 
”).
When you then hit “Play” you are taken to the new playing interface -
The top of the page is greatly simplified, with all of the entries (buttons, Clozemaster banner etc.) having been removed and replaced with a simple X in the top left corner.
The Multiple Choice and Hint buttons now have words to describe what they mean, and the Help/Flag Sentence/Round History have been pushed into the button with the three dots (and Flag Sentence is no longer bright red) -
At this point I could go into a long discussion about flagged sentences and correcting errors, and whether reported errors get fixed (which may depend on the language etc.). Therefore I’m not sure that “hiding” the reporting flag is helpful - and also I would often tell people to use the “red flag” to report errors, which I couldn’t say anymore as the flag won’t be red. On the other hand, I think that there might be an opportunity to come up with a better system for discussing and then reporting errors by simply using these discussion forums.
There is also now a “Teach Me” button, which I’ll briefly mention in a separate post.
When a cloze has been correctly answered, the interface changes as shown here -
The most obvious change from the current interface is the list of options for adjusting the next review time. In addition, the other buttons on the current interface all appear, although some of them such as Discuss and Edit have moved to the bottom right of the page.
If you don’t want the list of options Easy/Hard/Reset/Mastered then you can press the arrow next to “Next Review” and this options panel will disappear until some future time when you might choose to press the arrow again -
The only notable change to the multiple choice options is that the option boxes no longer have a purple background -
Finally, on round completion, the interface again looks a little different, but there don’t appear to be any changes to functionality -
Mark as Known change
I did encounter one significant change while playing related to marking items as known. I use the Alt+K keyboard shortcut to mark items as known.
When marking an item as known (using Alt+K), the interface now immediately moves to the next sentence.
Usually when I mark an item as known, I immediately want to move on to the next sentence, but that isn’t always the case. Sometimes I might mark an item as known, and then look at the sentence, perhaps examine other parts of the sentence, use the wiktionary interface, or else choose to mark the sentence (and possibly other sentences with the same cloze word) as “Ignore”. I can no longer do any of these things with the new interface, as the sentence disappears before I can do anything. I would have to change to only marking a sentence as known as the last thing that I do which would take some getting used to.
I also noticed that if I hit Alt+K and then immediately hit the enter key (which is my current behaviour for most “mark as known” sentences), the new interface will frequently skip over the next sentence in the list, so that instead of playing 20 sentences in a batch, I might find that I only played 16. The other sentences would still be due to play/review as they didn’t get played, but this is still an annoyance, and it is also clearly a bug.
In short, I fully understand why it makes sense to immediately move on once a sentence has been set to “mark as known”, but I would prefer to stick with the current behaviour.
that and other fixes should be up tomorrow/Friday, will post back then!