No, don't change if you have booked all inclusive at a reasonable price.
My Husband and I visited there last October and weren't expecting much but we were very pleasantly surprised!
The location was great - right on the beach. The beach bar in the front of the hotel had such a lovely atmosphere.
(Even in October, we sat out there until midnight as we would prefer to be outside rather than save seats all night just to watch the entertainment -but after seeing the first nights show, we made a point of going inside each evening just to watch it because it was some of the best we had seen! We were impressed by it all.
Just behind the hotel is the train track - please don't let this put you off - is not noisy and does not bother you, especially if you ask for a pool/sea view. It is so handy to get on the train if you want to visit Barcelona etc.
The shops are behind that - literally a couple of minutes walk and I think they have stalls out in the street every evening. The walk is interesting and there are plently of things going on for the children.
When we were there, other guests visited the other hotels in the Chain and all said they couldn't wait to get back to ours.
(We have stayed in Royal Star and Royal Sun in the past and would never go back but we will return to Santa Susanna)
If you stay there,on an all inclusive basis, you can still visit the others but I don't think any of them offer a better position.
We met so many lovely people there and we felt very safe. If you want to know more, I would be happy to advise.