I don't think the current Discord verification is necessary, most other Discord servers use easier verifications such as reacting with a tick to a message, in any case I think that the verification with Minecraft should be only to access the channels in the SERVER CHANNELS category, and that the rest of the server should be accessible by anyone without being verified with their Minecraft account.
In addition to this, if the Disboard bot was added to the server, the Discord server could be used to grow the Minecraft server, (as if it grew as a community server it'd also reach to more Minecraft players). Servers like PurplePrison already do this and they have lots of members.