Holy hell, this is so amazing. From those links you posted, with some tweaks, it works again. Would really love to see Oblytile development go back into action again. This will make such a huge difference in W10 for me, and so many others.
It's amazing until you realize that there are already programs that do that, but they all don't support wide tiles unless they are actually a UWP app from the store (to my knowledge). I don't know about you, but I loved the later OblyTile versions so much more than the earlier ones because of the wide/large tile support - start menus aren't the same without them. :')
OT was made from some completely unrelated bug or something with Windows, though, so I think that Argony-OT would have to completely rebuild the program from the start in order to make it work with Windows 10 - but still, that problem with only UWP apps making wide tiles persists.
The best option IMO is to go with another big tile creator like Pin More, WinTileR, TileCreator, or Better StartMenu. Other options would be trying to get Argony-OT to make OT open source and put it on GitHub (which I think is a good idea), try making an app that's open source on your own, or use the method with VisualElementsManifest.xml manually without wide/large tiles, and pray that Microsoft makes custom tiles easier to make.