But if you want to consider previous MEs "shooters", fine, but that doesn't make the other argument any more correct. They won't be "turning" ME4 into any more of a shooter than ME2/3 were.
If they did, they'd have to legally change the name to Gears of War: The Shepard Missions.
I agree with what that guy said: Mass Effect was damn flawed but on the right track toward perfection. ME2 completely derailed it.
Yeah I loved ME, warts and all. Great world building, that game really felt like they had built a convincing universe. It was almost like playing through a scifi movie. The gameplay had problems but a lot of it was just poor balance and variety.
ME2 veered way too far into shooter territory. The thing about the ME games is that they are very mediocre cover shooters. The one button gameplay has little depth and the controls are often infuriating as a result (accidentally hugging cover or doing unintended actions). Making ME more of a shooter is doing the series a disservice IMHO.