Changeling 1.2.3 and DominionLib 2.1 have been released. This is a big release, so please update the two mods together to ensure compatibility.
Most of Metamorph's new features have been ported to Changeling, including the new survival morph menu, and the improvements to morph abilities and actions.
The new survival morph menu replaces the old survival morph menu and the morph scroll selection menu. From upstream Metamorph, the survival morph menu now supports navigating morph choices with arrow keys and enter. Changeling improves upon this unified menu's design: More buttons close the menu, a demorph button has been added, the morph removal button has been moved, and morphing can be done by double-clicking a morph. Metamorph also removed the recent morph hotkey, but Changeling has added that back in. Changeling's new survival morph menu in Changeling should feel fast to use.
This new update also comes with better handling of undefined morph config properties: they now default to the mob rather than the player. Entity morphs without the speed property now also default to the mob's approximate speed. Changeling's vanilla morph configs are unaffected, so this feature is mostly useful for modpack creators.
Finally, particles from entity morphs are no longer visible to their owner in first-person. This greatly improves visibility for players morphed as blazes.
Enjoy the update!
Edit: Also, Changeling now uses a JSON-based config system for basic morph settings. This does unfortunately mean your existing configs won't work and you'll have to copy them over. Luckily it's just a few booleans so it should only take a few minutes. Sorry for the inconvenience!