Tasker has never been a beauty queen.
Android's most powerful automation app
And it honestly looks pretty good.
There are two completely new themes in Tasker 5.0: the new default Tangerine and the greyscale Clouds. We also have the new UI in some of the old theme colors: Dark, Light, and Light with Dark ActionBar. Beyond the colors of each theme, the new layout is quite similar to the old one function-wise with some Material Design loving, but there are a few functional switches, too. Most notably, the New Task/Profile/Action button is now consistently in the bottom right Floating Action Button rather than moving to the bottom middle during Task assembly. This now pushes the icon picker for a task to the middle of the bottom bar where the new action button used to be during Task assembly.
This is for certain a beta, and while the new UIs are interesting to play with, the app is a little crashy right now, so if you rely on Tasker for anything super important like your alarm clock, you might want to wait a while. Tasker 5.0 also seems to only support Android 5.0+, so if you had any old devices kicking around on Kit Kat, it looks like you'll be staying on the current version.