Busch Gardens is a lot different from Disney in a few ways. There is no feeling of "magic" I always miss that. There is no fast pass and unless you pay an additional 35.00 per person (I think that is how much it is I never buy it) you are going to wait a long time for the coasters.

I held a season pass for years but when my DD transitioned from kiddie rides to the bigger stuff I just started to resent that i was spending all that money each year for passes and we would spend half of our day waiting in line. It's not unusual for an hour plus wait for the coasters and during busy summer weekends I have seen it at 2 or more.
It's different that there are not the guidebooks out there to plan that trip. There are not message boards where people talk about every aspect of that park.
It is a gorgeous park, there are plenty of rides for a day. I don't think you need more than that.
The park is smaller or at least it feels that way and there are hills so be prepared for that.
There is no full service restaurant, all the food is line food.
It's not close to Disney but it's a decent substitute.