Atlantico, has it ever occurred to you that the reason some have been saying it isn't necessary was because the features that are restricted to it (the things you are saying we must have or the game loses it's identity) should have been accessible in both modes to begin with, like they were in Origins and DA2?
The way I see it, DA:O was basically always in what is now referred to as tac-cam mode. Then there's this new thing in DA:I which never existed before, action hack'n'slash.
Merging them would be fine by me, and I know it would work gameplay-wise, because then it would be much like it was in DA:O, but removing tac-cam? No thanks. Between two evils, I'll pick the lesser one.
I use normal mode to explore and tac-cam to fight. You go ahead and try to fight in normal mode and see whether or not you'll prefer it to tac-cam. If you do, Laidlaw will surely send you a postcard next Christmas 