I've been in a similar situation. I decided that I need to have confidence that I know what's best for my child because I know him better than anyone. He is much better socially with kids a year ahead of him and I think skipping K plus differentiation and online courses will work well for him. We are going to talk to the school about the skip this week. So far from what I've read this is our best option since we have no gifted schools and subject acceleration is too difficult with scheduling. My son went to full day prek this year because I thought full day would be an issue too but it hasn't been at all and now he's bored. I wouldn't worry too much about the full days. That transition happens quickly. Anyway that's my opinion and what we are doing =]. Good luck!