Most financial advisors I've interviewed do not have the authority to trade within a 401k. Most of them are interested in managing rollover IRAs and other investment accounts not associated with an employer. They generally charge 1% of assets under management. Too much for too little in my opinion.

There is a strategy called, "Dual Momentum" that has returned over 17% per year since 1974. It's simple. It's cheap. And it's effective. Check it out here: Momentum
Just read up and make up your own mind. Past performance is no promise of the future but I like the simplicity of the system.