You might get better response if you put your question in the form outlined here:viewtopic.php?f=1&t=6212
You should also list the ticker symbols and expense ratios for the funds you have and the other funds available in the 401k.
You can plug the domestic tickers into morningstar instant x-ray and it will tell you what your current breakdown is, and compare it to VTSAX (total stock market) - that will give you a sense of how far you are tilted to small. If you do want to tilt to small, there are a lot of threads and papers on that subject - there may be higher returns for doing so, but we don't know if those higher returns will persist in the future.
You have a very low bond allocation - you may want to consider upping that - even to 10% - to give you something to rebalance against.