Bethesda says no mod support, I say false. It really is unreal slapped on top of oblivion, the data folder is nested in a lot more folders but same concept.
The esm and esp files appear to be 1 to 1 in file size with old oblivion on the latest update. Haven't done much testing but I have modified the iron longsword to do 10000 damage (1734 due to low one handed level). It's probably safe to say all mods that don't require oblivion script extender will work for the remastered.

As for load order the file is also located in the data folder this time around. You can use the old construction set to modify the files

game data path:
steamapps\common\Oblivion Remastered\OblivionRemastered\Content\Dev\ObvData\Data