Can you elaborate a bit on what "worries" you? your first paragraph kinda gives the impression that you are worried about visuals, but then the second paragraph you say it is honestly not the graphics.
I would just suggest that you dont look at brink like it is a game meant to be realistic. If anything, it is meant to be "artistic" and intents to visually stimulate you. Simply put, if you go to the movies and watch star wars and keep thinking to yourself "wow that is unrealistic, and impossible, and fake..." you your own experience at some great movies. So just have some 'suspension of disbelief' (google it) and enjoy it for what it is, and not what you think it should be.

Oh and regarding the voice, it sounds like that because the guy has an accent. But that is there just to further separate you from the typical gameplay.
I'm not so sure what the problem is here, there is nothing wrong with the graphics, not all games have to be mega realistic life like graphics, cartoony does not mean its for kids or anything like that, infact, i don't even think brink is cartoony, its a mix and artistic style, like the devs say, when you look at a picture of Brink, you KNOW its brink. What you were saying about how when the mainframe was hacked and it turned from blue to red, that's more for the players more then anything, it's so you can see clearly that the mainframe has been hacked or not, this is how brink is, and i love it.
And the voice acting is wonderful in my opinion, and i love the accents, not just the same exact voice for every soldier, i don't want to hear the same american voice all day saying NEED A MEDIC! or anything of the such. So i see no problems here, everything was done great from what we seen, and i expect it to be even better when the day we all pray for to come sooner, the release date, arrives. :thumbsup:
alright, i like the artistic style, but i think some particulars of the graphics are poor. i wasnt complaining about the way that the characters or the plane look but the way that youre taken out of the world.
i think that features of the actual game world changing takes you out of an otherwise immersive experience - i would much prefer it if the world existed in a logical way but there were just circles around things like objectives - i think there needs to be a separation between elements to aide the game mechanics, and the world itself (which i'm definitely NOT saying is suppose to be like the real world). its like when a game tries to justify its menus or tutorial within the plot line - its just a bit annoying
BF:BC2 handles this well actually - flags are raised and lowered depending on which side owns a conquest point, but there are actual HUD elements which make it clear which is which.
and it isnt the accent of the characters, its simply the quality of the voice acting. would you get that sentence in a (good) world film, hollywood or not?