Hmm, after a first test this seems to be a misnomer - this plugin actually does not seem to DEPLOY anything - it just "manages" your config file, so WP-Multiconf would be a better and less misleading name.
Or am I missing some important part of the functionality?
I do not see this plugin doing anything that has to do with DEPLOYMENT - no files are moved or copied, no git repos are integrated or managed, no database is copied / upgraded / migrated or whatever - it just simply replaces the DB_NAME, DB_USER, DB_PASSWORD, DB_HOST defines?
OK, tere is some additional user rigght restriction functionality, but regarding DEPLOYMENT I can not see any code that would actually deploy anything...
A little bit disappointing, but might be a good building block for a real deployment plugin...