New and renegotiated contracts these days tilt the balance more toward performance-based fees: often just 1% of revenues and up to 12% of profits (and sometimes only net profits at that).
Hardly a single mutual fund company with a sales load structure could justify offering only its own mutual funds to its employee 401(k), based upon fees and performance.
One mutual fund that Rosenbluth recommends based on this criteria of performance, fees and risks is the Invesco Diverisified Dividend Fund (MUTF:LCEAX).