This has been brought up before in this thread, but I think it needs to be revisited—
In flashcard testing mode, the current behavior is to have a time interval under each score, telling you how soon you will see the card again if you choose that score. I realize the intention was to make the system more transparent and to move away from the "points" system. However, in my opinion, the current implementation does not work very well.
The main reason: In spaced repetition, while the "right" scores give me different time intervals, the three "wrong" scores almost always, in my experience, have the same time interval written underneath. One, two, or three, they all say "one day" or "one day 6 hours" etc.
Since I'm a long time user, I know to hit 3 for "almost remembered" and 1 for "don't know." However, this is not clear to new users. I was helping a friend migrate to Pleco from another flashcard software yesterday—I'm quite the evangelist—and this was a major point of confusion for him. Presented with three apparently identical options is never good UI. Other than the Chinese "一 二 三" characters, the buttons are the same. There may be some situations where this is not the case, but I haven't seen them in any of my (fairly extensive) daily use since 3.0 came out.
The second reason: Even if the buttons did show different intervals, I still think it's easier to understand with the former labeling style of "barely remembered" etc. I don't think a lot of users feel qualified to know whether "2 days" or "6 days" is more appropriate, especially if they're new to spaced-repitition learning. On the other hand, answering a straightforward question like "how well did you remember this card?" is much less intimidating.
Finally: I find myself frequently adjusting the number of points to test per day in the "Card Selection" settings screen. When the system wants to give me hundreds and hundreds of cards to review, because I haven't tested for a few days, pretty much the only way not to give up completely is to reduce the number of points per day, which will decrease the number of cards scheduled to be tested. However, adjusting the parameters like this makes the interval labels in the flashcard test almost totally irrelevant. When I score myself "4," it may say 2 days, but if tomorrow I have some extra time and decide to raise the daily point allotment, I might see it in one day's time instead.
You might say that this is non-ideal testing behavior, constantly adjusting the parameters like that, but it's simply a reality that not everyone can do their daily SR 100% of the time. You've mentioned trying to move away from the "points" system, but I think whatever you do, you should make sure there remains a way to adjust SR quantity and make that "768 cards due" message a little more manageable. It would be great if there were a way to do this more easily than my current method, which I only discovered after months of repeatedly failing to start up a good flashcard habit.
Sorry if this sounds too complainy — I just love Pleco & want to help it be the best it can be! It's only my opinion, but to sum up, my recommendations are as follows:
1. Restore the "almost remembered" / "remembered perfectly" etc. scoring button labeling for both SR and normal flashcard tests. These options are less intimidating to users and easier to select which one is appropriate. Just let the system decide what exactly the time interval will be.
2. If you remove the "points" system or make it totally behind the scenes, make sure there is still a way to manage a humongous pile of due cards. Maybe allow users to set a maximum amount for each SR test.