This is one weird change, and I have very mixed feelings about it.
First of all, I have now simultaneously the old tree and the new path depending on the platform I use. On my main PC on web I have the new path, on my Android app I still have the old tree, on the Firefox mobile I have the new path, and on my new laptop on web I have the old tree. The old tree and new path don't line up. Whatever I do in the other one, does not affect the other. I also cannot do the legendary challenged on web, because I did not have time to practice far enough with the old tree! So now I have stuff on golden on the path (for about 3-4 units beyond my original progress even?), that are still on level 1-3 on the old tree. (The same with all 4 courses I have there now.)
It looks like they are still updating the path as we speak, because I just noticed they've added the pop-up for these path buttons - previously it would just launch the new lesson without explaining what it's about. So of course I can always practice those missing skills, but it's never the same because I don't get any progress from it, because DL already marked those as done for me. (This is also just my personal opinion, as seeing my visual progress as something than just XPs is what keeps me going.)
I think the good thing about all this is how it focuses on topics more widely now, but I still don't understand that level system. For example, with the Swedish tree, I used to go back to the earlier skills whenever the current ones started to feel too overwhelming, meaning, I hadn't learnt about those enough yet. But now it feels like it makes no sense and gets too difficult too fast. I haven't had time to memorize the words and I'm already given more words I don't remember learning earlier. But maybe they are in those earlier "passed" waypoints that I never did but DL still marked for me as done... I think I'll try out if Duome can help me with those skills so that I reach the point where I ACTUALLY am, skill-wise, before I continue from where the DL path thinks I'm at...