Definitely get with who is in charge of your 401k plan.
My wife's 401k is through One America and their options were absolute garbage. They had over 100 funds to choose from, mainly American funds, all with high fees.
I had her in an S&P 500 Index fund with over a .30% fee (not sure exact number).
Not sure what happened, but about 9 months ago we get her statement and her money was automatically moved to the Vanguard 500 Index Adm (CFVW) with a .04% fee, which wasn't previously an option. The options still contain American Target Date funds with high fees, but now also contains a whole line of Vanguard funds.
I'd like to take credit because I told her to go in and talk to them about it, however she doesn't even want to understand how this type of stuff works so I'm 100% her she didn't. Thankfully someone else probably did.