Split stay on the First Visit. Good or bad ?

[WDWNext]

Planning the first Disney Trip for April end 2013. I am looking for suggestions from WDW Experts !!
We are family of 4 (2 Adults, 6 yr old daughter and a 2 yr old son)

Here is a snapshot from inside our brains...
We will do a split stay, 4 nights @ Pop, and 3 @ AKL in that order.
First 4 days we plan to hit the theme parks will full energy.
4th night hopefully our luggage will end up at AKL. We will unwind the entire 5th day @ AKL.
Hit a theme park on 6th day (whatever the daughter wants, it will be the 2nd day in her preferred park)
Unwind/checkout on the 7th day @ AKL and transfer to hotel near Seaworld.
8th day and 9th day @ Seaworld and return to home on 10th day.

We plan to purchase the 5 day Theme park tickets (no Hopper) and do a Character breakfast.
We do not plan to rent a car initially, but will rent one on the 6th or 7th day of the trip.

Please let us know if we could plan around a little better. All suggestions welcome !! Thanks in Advance !!