Upgrading Dragon Age: Inquisition from Standard to Game of the Year Edition

This has been how EA has worked for a long, long time. This is why a lot of people wait a year or so to buy a game, so they can get the bundle/GOTY/whatever at a better price. This is also why EA is one of the biggest gaming companies left, they make money and use it to buy smaller ones who might not use such greedy tactics. Also, I doubt Bioware has much say in such things.

Also, these forums are probably not the best place to get EAs attention, they're for players to help out other players with the game, even most of the moderators are volunteers not affiliated with EA. 

There are no plans (nor are there likely to be) to offer an upgrade to GOTY edition. Looking back at their older games, you should see how this has never happened. It's unfortunate, but not surprising.