This is a good and timely subject for me.
I have left two employers in the last two years. Both had VOYA management for their funds and their funds available varied wildly.
One was a small startup business with 50 employees and their funds sucked, and they were able to hold your funds up to 10 days after being paid before they actually invested the funds. This was sly wording meaning that they held your money for 10 days before investing the funds. The best fund I could invest in was a Blackrock Russell 3000 institutional fund with a net and gross expense ratio of 0.28%. I was smart enough to close the account shortly after leaving and rollover to a tIRA with excellent ER on their funds. It cost me $40 to close the account, and I had a $30K cash check floating around for about 15 days before I could reinvest it (talk about stressful!). There were no other fees associated with the account that I was aware of.
The other was with a fortune 500 company with very good funds. I've been more hesitant to close that account. The funds are excellent. The expense ratios on the S&P500 institutional fund is 0.06% with no additional fees. I've been finding it hard to move it over to my IRA's. It might save me a couple bucks... but the hassle of moving the money, converting it all to cash, having a check(s?) floating around, the market doing so well, probably paying on $40 on each account to close it (it has a 401a, 401k, and roth401k) makes it hard to motivate me to move the money. I have not seen any additional fees associated with the account.
So, the two investment plans, although both managed by VOYA, are VERY different and whether or not to move the money away from VOYA will be very plan dependent and differ from person to person.
PS. My investments look like I might have a 20% year!