Mass Effect 3 is currently my most anticpated video game to date and it will most likely stand that way until it comes out. I played through the first two in the series multiple times. With that said I am eager to see how my decisons play out. However, when it comes to changes in certain video games there will always be people displeased with what they see. It seems as though Mass Effect's new and improved combat has caused quite a stir with some hardcore bioware fans. Let me address those.
In both Mass Effect 1 and 2, one of the most consistent flaws was the combat system. In the first one it was pretty weak with the constant annoying but humorous one liners such as "ENEMIES EVERYWHERE" and "I WIL DESTROY YOU" being uttered by enemies every 5 seconds. In the second one there was some improvements but the fighting was a little too slow paced and enemies just took cover and shot or we had the occasional bigger enemies walking and shooting straight towards us. Mass Effect 3 addressed all of these problems. Enemy A.I. is intense and much more aggressive than the previous games. Shephard can just vault over objects instead of taking cover first. He can even roll now. I personally think all 3rd person action games is flawed if players can't either crouch or roll. Movement is fluid and the melee system is better than ever. Awkward punches are replaced with new melee kills designed for each class.
Some fans are dissapointed to the point where they automatically compare this to Gears of war. To quote some people, "It's now a hack and slash/shooter instead of an RPG". Just because they improved drastically on all phases of combat doesn't mean they are totally ditching all of the RPG aspects. If people actually payed attention to the Mass Effect 3 demo and interviews, they would've seen the customization and mods that it had to offer. Weapon mods are back and powers can now evolve multiple times.
Dragon Age 2 is something I've seen brought into the Mass Effect 3 arguement on numerous occasions. I've never played Dragon Age 2 but after doing research I noticed 2 different teams worked on both Dragon Age and Mass Effect. These are 2 different development cycles. These are 2 different franchises.
It's starting to get out of hand to the point where people are completely ignoring the good things Mass Effect 3 has to offer. I've seen no acknowledgement of the fact that planet exploration is brought back into the equation and is better than ever with 3 drop zones into the planet instead of only 1 area to explore. I've seen no acknowledgement of the fact that it is still decison making gameplay and our decisions will turn out for the better or worse.
There are some things in the first Mass Effect I feel are being exaggerated just because they aren't in the second game. I've heard people complain about the MAKO being gone. If I'm not mistaken there were more people complaining about the MAKO so I understand why that vehicle is gone.
Anyway I could go on and on but these are just my general thoughts about all the concern. To this day, the only legitimate concerns about Mass Effect 3 is EA's control over Bioware, possible DLC milking, and rumors of multiplayer.
Here is an article explaining some of the RPG elements in depth.