I've been to Orlando at Easter, recently - 2009 and 2010.
We do DIY. This was our spending on the last trip (2010) for 2 adults for 10 nights:
Flights £340
Hotel (Four Points on I-Drive) £210
Food, drinks etc. £200
Transport £20
Petrol to/from the airport £40
Universal passes £70
Insurance £20
Total cost: £900 per adult (£90/night all-in)
This year, it's getting a bit more expensive. We've only booked flights and insurance so far but for the 11 nights it's looking like...
Flights £420
Hotels £330
Food, drinks etc. £250
Transport £20
Petrol to/from the airport £40
Universal passes £95
Insurance £25
Total cost £1180 per adult (£108/night all in)
What you're paying does seem rather excessive since you're only getting two of the elements above, which we paid £550 per adult for in 2010 and £700 for in 2011.
The best ways to cut costs (we have found) are:
- fly indirect, it's about half the price
- fly strange days (we find Monday and Thursday to be the cheapest, Tuesdays are also good) and strange times to get the cheapest flights. Our logic is that you're exhausted and fed up no matter what time you get there

- Book separately
- Fly to MCO, use the public buses - saves SO much money

- Be realistic about the food budget. We budget £25/day now and that includes the alcohol budget. We simply cannot eat more than one "major" meal a day in the Orlando sun, so we grab a $4 slice of pizza for lunch and grab a few bits from Walgreens (snacks, water). We also don't buy soda in the parks which adds up a surprising amount
- Don't do Disney

(It's VERY expensive, but then I've done it plenty of times so I don't feel the same need to go do it all over again).