We loved the Dolphin so much--we're going back for Christmas. The staff was wonderful (the cashier at Tubbi's saw me every day for a week and called me by name every time,) we had a view of the Boardwalk, and Epcot and could see Illuminations from our beds, the heavenly beds are fantastic. We went swimming in late Feb/early March and the water was great. The hotel wasn't crowded because most guests were conventioneers which meant we had the pool/buses, restaurants to ourselves. The soap is very luxurious--I'm still using it at home--I brought a bunch back with me. DD loved being able to take the boats. She's 13 and fell in love with this place and doesn't want to stay anywhere else. And with the great deals we get--gov't rate and upgrades with our SPG card--I don't really want to stay anywhere else either.
And what's the deal with the charging to the room? I've stayed at Disney hotels before and I noticed no difference between charging to my room and charging to my credit card. It's all going to the same place anyway. It certainly wouldn't make me switch to a different hotel.
Whichever way you go, I hope you have a great time. I just wanted to put in my 2 cents that, in my opinion, the Dolphin/Swan isn't lacking in magic.