Tools needed for modding are basically the same as MBM, but with some differences here and there. I know that graphics handling changed a bit from 0.1, which I'm not that happy with (more oriented for straight Photoshop/GIMP import of sprites, 1080x1080 individual sprite size which cause slow spine import, etc.) and code requirements to make new graphics to work is probably somewhat different too.
They mentioned it doesn't require for BepInEx plugins to work correctly... but I think devs will need to explain/make some tutorial for graphics edits in the future/at the time of release. ESPECIALLY their Spine Texture Packer settings! I've only made my own assumptions for these settings in MBM and ProjectR v0.1 and it's not great to have to guess them - more time spent on testing.