You hit on one way to evaluate if Fidelity Adivse is good for you - a new employee - not an employee with no experience.
Ask Fidelity what funds would they have put you in X years (you choose) ago, how would they have changed them over the years and how would they perform. This is similar to looking at an employee's resume.
I'm guessing you might get some push back from Fidelity. But considering the money you will be paying them over the years, they should be willing to do it.
Well, they are an "employee" with lots of experience...
Yes I went through all that with them, spent about 10 hours of their time and they gave me both their actual and theoretical past performance of their allocation strategy for the strategy back to the mid-80's (asset protection, tax aware given my current salary, similar mix of investments outside Fidelity, and moderate growth). They have in-house tools that show all that, and gave me a report. After fees their alpha was around 0 from what I could get myself if I had picked the right handful of cheap balanced funds.
So why not try it? I'm willing to give them a year probationary "employment" to see what happens. Worth the $8K to me, heck that's only a month's office rent.