This is would allow admins to monitor autoblocks more efficiently. Special:BlockList buries the autoblocks amongst other block types, and adding an option there to "Show only autoblocks" wouldn't fit well with the other filtering options.
XTools offers functionality to list autoblocks but does not include the block reason.
Just like Special:BlockList, the AutoblockList should include a timestamp, target (block ID), expiry, blocking admin, block parameters, and reason.
Once deployed we should update https://www.mediawiki.org/wiki/Autoblock accordingly.