We love the Dolphin. Did a split stay once WL/Dolphin and could not wait to get back "home" to the Dolphin. The beds, room to move in the room, LOCATION, service, cleanliness, I could go on and on. We have stayed there 4 times now...never disappointed. We have only stayed there with our kids who were ages 9 & 5 at first visit and then 19 & 15 last visit. It is their favorite hotel for the $$$, we love CR and the Polynesian too, but let's face it, we have never paid over $129 for the Dolphin and that is the best deluxe value in WDW to us. Join the Starwoods reward program, if there is an upgrade available you will receive it being a member. Yes, there are resort fees, yes you pay for parking...it is still a deal for a deluxe. You can purchase packages and get them at the gate...no biggie to carry them back to the resort. The Grotto pool is awesome, the Fountain restaurant is awesome, great food, ice cream. Again, walking to 2 parks? Not having to wait for a bus at the end of the night? I would not hesitate to stay there..matter of fact it is the first place we check on. I have always had nothing but excellent service there which is worth giving up hearing "Have a Magical Day". My kids toys have been arranged, we have had extra towels left for us without even asking. Room service ahs always been timely. Only once did we have a situation with a view issue...the couple in the wing to the right of our room liked ot keep their drapes open, and well, go au naturel'...we happened to be on our balcony and there was no way to avoid seeing them standing there, looking out at the view as well...but we made a call and their drapes we closed after that. I would not worry about your choice of the Dolphin..I also do not get the whole "no Disney feel" thing...you can see Epcots fireworks, you can take a short walk to the Boardwalk, you are surrounded by Disney. The gift shop is called Daisy's...
again, unless you are hugely into character wake up calls, plates in the shape of mickey ( which are cool, but not worth skipping a resort over, you can get those in the park) you will be fine. We have even had the captain of the Friendship boats trade and give pins to our kids...and where else on site are you going to be earning rewards towards a free night(s) stay?
I would expect your stay at the BC to be similar...yes SAB is amazing, yes the rooms are sizeable, but so is the rate. I would say you will be in a similar feel...way more of the BC than of WL.