My take is two-pronged:

1. I think it's good to get rid of 'master' even here since using the term does connote 'slave' as its antonym in various ways throughout technology. The more peculiar 'master' becomes in computing contexts, the easier it is to forget the old habits.

2. This shouldn't be seen as too significant either - it's a small capitulation to outside pressure, which ought to continue as the strategy is clearly working. Many things are rotten in IT and being satisfied with the crumbs is a mark of a fool.