Probably not worth switching over. I would use Vanguard to trade Vanguard funds/ETFs, because they don't charge fees for their own funds.
If you want a brokerage account, they aren't a bad option, but unless you have >$50k in their funds, you only have 25 trades at $7. It's fine if you don't trade a ton, and makes life a little simpler with one brokerage instead of several. However, there are a handful of other brokerages with comparable trading fees (TD and Schwab come to mind, but there are probably at least 5 others with similar fees).