The new features:

1. Multiple animations per line!
2. A scoreboard sidebar (similar to Featherboard)
3. -radius and -world parameters

The changes:

1. Animations should be a lot smoother looking
2. A new API for developers (The old API should still work)
3. The placeholder syntax (from {my-variable} to %{my-variable})
4. the animation syntax (from animation:my-animation to ${my-animation})
5. The config is way more descriptive and now has comments (TitleManager will automatically convert your old config to the new format on first run)

I'm sure there's loads more, that I just can't remember, please have a quick read through of the Wiki before you ask questions, found here: https://github.com/Puharesource/TitleManager/wiki

If you've got issues with the plugin, please write an issue on the issue tracker found here https://github.com/Puharesource/TitleManager/wiki