Presumably you've played through the game and liked it enough to want more DLC. That's what you spent your money on. If you still think you're entitled to a refund, I'm not sure what to tell you.
As I mentioned, this is probably something that will come up when they actually have something to say.
They can't even officially confirm that there's new DLC coming out yet, so it shouldn't be surprising that they're not yet offering some sort of formal response as to why such a DLC couldn't be made available to the old consoles.
Wait until the DLC actually gets announced and we see the press for it. I'm sure it will get addressed somewhere; the save transfer announcement is just giving advance notice of the change in supported platforms.
I expected equal treatment. How am I responsible for BioWare's irresponsibilty towards a portion of it's fanbase by ditching DA:I PS3/360 support midway through it's life? How was I or others to know DA:I PS3/360 would be abandoned, before purchasing? How are people who recieved the game as gift responsible?
The save importer ATLEAST acknowledges JoH purchases. HOWEVER, from what I've seen/read PS3/360 purchases for the Deluxe Edition DLCs are not transferable. That means any old gen Deluxe Edition buyers are forced to buy a PS4/Xbox One Deluxe Edition version just to play extra content they had already purchased.
Perhaps, by why wait? You don't let a wound fester. Why would leave your fanbase in the dark, potentially angering them further? I, myself, am much angrier because of this, as a result I've dropped BioWare products from my "to purchase" list.
They may not have officially announced a DLC, but it is coming. They may not have officially announce it, but they've implied that it is because of PS3/360 limitiations.
But perhaps your right, we'll just have to wait and see. I'm not sure what good it will do to satiate some of us more livid fans already miffed from this situation and BioWare's prolonged silence on the matter.