I agree (see Roku Preview has now been updated to the new experience (Plex would love to hear from us) - #15 by mrig from May)
However at the moment it not just unusable by its very nature it is just soo buggy that it is literally unsable beyond being able to play a couple of episodes that sit in the recently added and the only way I get to watch TV/Movies on Roku is either airplay casting or using the preview (with bad UI but at least with no critical bugs)
P.S. one acknowledgement I want to give is that at least we did get back the Music libraries that in May had been completely removed [though they have removed the lyrics functions - which had been broken for a while also on the previous UI]
