Should I just be moving all of this over to an actual Vanguard account to take advantage of cheaper, automatic investing
Yes.
Since you are following a simplified Vanguard-based approach, there is absolutely no reason to be anywhere but Vanguard. Lighting $20 bills on fire every quarter is dumb.
I've heard people say that non-Vanguard brokerages sometimes have better websites/platforms/etc, and I've been tempted to believe it. But, holy fuck, eTrade doesn't allow you to do scheduled, automatic investing?! What kind of ridiculous garbage is that? "Uh, it's just way beyond our ability to program that in"?!?
In addition to the straight-up cost, I'd say there's a behavioral reason to move to Vanguard too: it will eliminate the opportunity for market-timing that you're currently doing with your purchases. Yeah, you think that market-timing is helping you, but it's probably not.
I'm guessing these are in a taxable account and I am not sure if mutual funds are generally commission free, even if you were to move to Vanguard.
Yes, they are. Just in case people who use non-Vanguard brokerages are unaware,
paying commissions for Vanguard funds is not normal! It's not something that you should just accept because it applies everywhere. If you invest through Vanguard, you never pay anything, ever.
But you can leave these where they are (since selling them would create capital gains) and move new money into a different broker and buy their commission-free products.
You can do an "in-kind transfer" to Vanguard, which does not create any gains/losses.
Here's the link, go do it:
https://personal.vanguard.com/us/openaccount (click "Transfer an account")