Make sure they install neutrals at each location. But, in general, the way the AC power is "installed" should not be an issue.Is it naive to assume that since this is a brand new builder construction that I will have less issues with the way the AC power is installed
More likely to be an issue are the devices and appliances you have in your house. Being a new or old house does not matter here.
Insteon, becoming more dual powerline/RF has become better at surviving in a noisy powerline condition, but I am not convinced it solves all the problems.
I find it hard to recommend any powerline communications technology as you just don't know the exact environment of someone's system. I've read many, many posts here and there are good and bad situations involving X-10, Insteon, and UPB, all related to noise, coupling between phases, and loss of signal across the home.
RF is a pretty busy space, as well. I am not convinced it is any better than powerline. Both can be made to work pretty well if you are willing to accept the risk of having to work at it a bit. Ultimately, dedicated wiring is likely the most reliable type of system, but most of us don't want to go through the work of adding them, so we trade off a bit of reliability for convenience.