@mrogers I mean, it's your money and you won't go broke by leaving the rest of your money in the funds you've already invested in—I just don't know why you'd do that.
If you were invested in a combination of the appropriate Lifecycle Fund and the C, S, or I Funds, then I would kind of understand that. The C, S, and I Funds are slightly higher risk but offer marginally higher returns (since they are fully exposed to the stock market and have no insulation via the bond market).
Conversely, if you were invested in a combination of the appropriate Lifecycle Fund and the F or G Funds, then I would kind of understand that. The F and G Funds are significantly lower risk but offer considerably lower returns (since they are entirely tied to the comparatively conservative bond market).
You're invested in all of it, though. You aren't weighting your portfolio to be purposefully higher or lower risk—you've just got a little money everywhere. I'd move all of it to the appropriate Lifecycle Fund.