I love the intuitive nature of Populi and its structure.
However, when one logs in, it doesn't look so pretty. I suggest you overhaul the look of populi to make it look more contemporary.
Some people at our institution have suggested that we consider a different LMS for this very reason. Students have high expectations of how their online experience looks, and Populi is starting to look a little dated.
Unfortunately, I don't have any specific suggestions since I'm not a design expert. But, I suspect people who work with Populi would have some ideas, as your https://populi.co/ web page looks more contemporary than the LMS itself.