What would you change about Duolingo?
I personally would want to have a tab where you can message friends on Duolingo, instead of making a discussion and hoping your friends will see it and talk to you. So then, you can privately talk to friends.
Their choices of text colors in the lessons make the text hard to read because of the low contrast between text and background. For example, in the new web version, for correct answers the translations at the bottom are green text on green background. The default font for the translation is also small in that area. These combine to make the text hard to read, especially if the language uses accents.
It never ceases to amaze me that there are web designers who think that low contrast text is easy to read.
I agree. I wish that the activity stream would came back or they would add something similar.