It is thought that Oasis has Bluetooth capability but it is not yet enabled.
As for energy consumption when using VoiceView, it will be greater of course, but with Bluetooth you can have a charger (via external battery or wall-plug) connected if that is of concern. Since VoiceView means there is more or less constant audio output, I would not expect wired-vs-Bluetooth to be much different in terms of energy consumption.
People that require a screen reader like VoiceView are probably not going to care that it lacks a front-light. And they will save $40.
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