I am also working on porting sprytile to 2.8 when I have time here: https://github.com/ologon/Sprytile/tree/feature/support_2.8
I think I will eventually be able to have it fully working, but it will take a bit of time, please be patient :) The viewport drawing code in particular will need a heavy rewrite, because support was dropped for the calls sprytile currently uses.