Personally I'm not a big fan of the idea, to me it seems far to android-y.
I like Ubuntu touch because it's Ubuntu touch, and I like it's personality.
I don't mind some ideas, but I do much prefer the style of homepage that I've seen before.
I'll try and find it, but it looked a bit like the today scope, except only had the weather and some apps.
Personally, I think the homescreen would be nice if it you could edit a bit more, if you could have your weather, your row of apps, your row of music or friends or what ever you want, but I think it needs to keep the unique feel, I think if it wants to, it can be a bit more KDE or gnome inspired.
There's a Android launcher which basically adds the windows 10 start button to your phone, I don't mind it, as it feels decent to me, but it's just windows 10 styled, I think we would be better imitating that, as it seems more like our kind of feeling than Android default.
Another problem I see, is that you swipe from the left to get your launcher, then you pull it all the way to get home, then you pull down from the bottom to access all apps.
The app draw means, you pull it from left to right slightly, you have your pinned apps, you pull it more and you have all your apps.
It's quicker and more responsive, it might not be editable at the moment, but my opinion is that, you've got the coding skills, I bet you could make the app draw look and feel amazing and add new ability's to it, and make it keep it in the feeling and style of Ubuntu touch.
That's just my opinion on the matter.