Unity recently giving early access to their new unity2d tools that are very much improved and important.
what they said:
Early alpha access for Unity Pro users
Perhaps the most exciting change is that we’re releasing features that are in development to Unity Pro users much earlier. With your feedback, we hope to cut development time by better understanding how we can meet your needs.
You can find the link to the current alpha from our Bitbucket repo.
Tile Map Editor
Improved Sprite Packing
And many more…
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