Wunderlist was just fine. Why the same in a new jacket done worse. Just because it has to be Microsoft? Microsoft, stop trying to be what others do better. Edge, why? Bing, why? Buy a good working app and make it worse, again. Why? As a UX designer to MS Business: stop trying to outperform others who already are market leaders. Start finding new solutions for new user problems and be the market leader there. If not, a Google will outperform you, because they understand user problems better.