Ha. I too am interested in DA:I but all I hear about it is how good it looks on PS4. I don't have PS4 but if the gameplay is good I'd consider the game anyway. No one talks about that part.
Sorry about that! I know I'm guilty of bad reviewing practices. I fear games that are linear, and the first ones were completely. You could make a new character and know if you went to a box in the third bedroom on the right you would find the same sword, etc. Can't stand that. So after about 10 hours of play, if it helps:
The World: seems to be almost completely open. You can travel anywhere that you've unlocked (through missions, war room operation and traveling) with fast travel and exploration, using a system quite similar to Skyrim. Monsters and resource nodes alike will respawn over, sometimes, a seemingly short period of time which can be great for crafting and difficult if you have it set on a challenging game mode. You can spend as little or as much time in an area as you want. I am probably on the second story quest after 10 hours but have completed ~30 or more. There are a massive amount of side quests.
The Combat: is similar to the last two, but cleaned up a lot. You no longer need to create elaborate tactical/behavioral directions for your party. You can simply give them favorite skills/spells that they will try to use first. The AI of the party is much more intelligent. This gives you more freedom to enjoy your main character, while at the same time having the option to go into a more time-based combat if you desire.
The Loot: is much more random than previous games. It ranges in rarity from Common (white) - Rare (blue) - Legendary? (purple). I got my first purple before I logged off, and it was just coated in stats. Even rare items come with open slots in most cases that you can insert reusable upgrades into. This essentially gives you the ability to customize every piece of gear you get and opens you up to the dreaded inventory battle of juggling space. Not always a bad thing if you are organized or know what you want.
The Crafting: is crazy compared to the first games. I am never a huge crafter at first but I took a look at it since my entire party found decent weapons and my main character still had his starting bow. Things were proving difficult so I went to craft a bow and ended up with a monster. Once you find a schematic you want, and I already have a huge collection of schematics, you can build the item. But it is the base item you make and it comes out depending on what materials you use to make it that come from a large amount of crafting supplies if you are an avid forager when in the wilderness. Armor - Weapons - Runes - Armor/Weapon Upgrade Items. It is all there.
Multiplayer: There is a lot I have not seen yet, obviously. But from someone who is very picky about games in this genre, it looks very promising and I can't wait to get back to it. I am most excited however, to delve into multiplayer and see what they have to offer. A brief glance at is showed about 12 classes to choose from (unlock-able after the starting 3 classes). Full inventory, crafting, shop, skill tree, quick matches and usual multiplayer options. The shop looked to include chests you could open containing randomized items for your characters. The chests ranged from Free - to a few hundred gold pieces (in game currency) - to platinum, I believe a currency you can buy with your hard earned people cash. Of course. It doesn't seem necessary, just an option.
I hope this helps. Sorry for the long post. I felt bad for my weak, opinionated vague response.