The point system at DP does include the park passes and a free continental breakfast. Also don't forget about the transfer costs from the airport to DP.
Check out EasyJet.com. Depending on when you go, it looks like you could go from Belfast to Paris DeGaulle (via London Luton) for as little as 15 British Pounds or so one-way.
We are doing London and DLP this summer using DVC points. We are staying at Royal Garden for 5 nights and Newport Hotel at DLP for 2 nights(passes for LOS and breakfast daily is included). We are taking the Eurostar from London and it stops right at DLP. Can't wait!
Connears
If there are three or more of you the points cost package at DLP looks a reasonable deal. The park passes and brekkie don't make up enough value over cash deals, IMHO , if there are just two of you.
Have fun Connears, taking the train is the best way from London to DLP IMHO. Particularly if you're direct into DLP .