2. Currently there's no detail how "sequencer" (party who create block) is chosen[2].
It will probably be centralized/federated at first, then decentralize ln due course.
The documentation already state SatoshiVM currnetly is the only one who create block. I was referring about how decentralized one works.
3. While we can "move" BTC to SatoshiVM by ourselves[3], i didn't find how to "move" BTC from SatoshiVM to mainnet which is a bit concerning.
It will probably through an off-chain Bitcoin to on-chain Bitcoin market of some sort?
¯\_(ツ)_/¯
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Using exchange/market works, but it should be done by interesting with SatoshiVM directly.