1. Lowers the cost of bridge transfers from Polkadot to Ethereum from ~6.12 DOT to ~1.49 DOT.
2. Register the Ether asset on Asset Hub in preparation for the Support Native Ether feature ahead of fellowship runtime release v1.4.0.
3. Ether is made sufficient and the minimum balance is 15000 Gwei.
4. Ether metadata: Name = Ether, Symbol = ETH, Decimals = 18.

For detail into what the proposal does, how it was created and tested, please read: https://github.com/polkadot-fellows/runtimes/issues/560