Over time, Wellington has been a steady performer. I don't object to management where a substantial part of the fund is in bonds. Bonds are different than equities and performance can benefit from management. These people manage Wellington, Wellesley, and several other well performing managed funds at a relatively low cost for Vanguard and have been associated with Vanguard for decades. Bonds also belong in tax deferred or tax free accounts, so if you want to own some bonds in a 401(k), Wellington is a good choice among the balanced funds.
The real question, however, is what are the best overall choices in your 401(k) and what is your preferred asset allocation. Do you have good index funds available, or do you have only managed funds? Whatever you are offered, you should pick the best of what's available to achieve the desired allocation.