Text/SpriteFont range tagging; New examples; New script APIs; Performance improvements & more.
For small projects it means typing in much larger numbers which I thought makes it a bit more cumbersome. I'm also reluctant to change any really long-standing features by default as it messes with people's expectations - there's years and years of tutorials, lesson plans, videos etc. which might talk about UIDs working differently, or somehow be broken if they expect incremental UIDs, so I try to be cautious about changing core things like this by default.