I was at SDC on Friday (23rd). I got to see the new 76/Indian Pt Rd. sign(s). I like them.
I just went through Google's Street View timeline for that intersection. I really feel like the reason they made these signs white is because they stand out more; they catch your attention instead of fading into the background. The older signs were unpainted wood with dark green accents, so they kinda blended in with the forest around them. The white-painted new signs pop against the browns and greens of the trees behind them. Also, the billboards on the back of the sign were there on the older sign, too.
As for the electrical box, that definitely seems to be the street light box. It's the only one on any of the corners at that intersection; if it was for the signs, there'd probably be one on the other side near the other sign. Also, it's been there since at least 2007, which is the oldest time period Google had on Street View of the intersection.
Someone mentioned the old version of the logo with the waterfall. That is still there at the entrance to the preferred parking.
So, personally, I love the new signs. I'm excited to see what they do with them for the Christmas season. Having the logo be the newer version (which has been around for at least SIX years now and nothing bad has happened due to it being updated) so that they can light it up at night is a cool idea. Can't wait to see it at night!
I'm attaching a pic I put together using caps from Google Street View and Swoosh's pic of the new sign (I wasn't able to get a pic myself). I'm also attaching a picture I took back in May 2005 of what the sign looked like then.