Thanks for the feedback!
Most software decisions involve compromises, the buttons are a good example. In v4 sometimes the buttons are at the top of the page (ie. edit client), sometime the middle (ie. edit invoice) and sometimes at the bottom (ie. edit expense/task). In v5 the app is consistent, the buttons are always in the top right corner across the mobile, web and desktop apps.
That said we’re constantly working to improve the UX of the app, it’s an ongoing process. Another user recently posted some more examples of v4/v5 differences: V5 UI/UX feedback