We seen both characters without costumes in the pilot. Not eight year olds.
I know they aren't literally 8 year olds, which is why I said that, in the released pictures, the costumes made them
look like they were 8 years old. Obviously they're going to be around Stargirl's age, but the costumes look odd on them and it leads to them looking like little kids in costumes that are too big for them. The new Doctor Mid-Nite especially, they should have just gone with a variation of the Yellow/black Beth Chapel costume, because she looks outright ridiculous wearing the old Dr. Mid-Nite costume.
In what way has Doom Patrol not looked like the comics?
First, I want to make it clear that I love the Doom Patrol TV show, and this is from somebody who has never really cared about the comic book version. I suppose saying they look nothing like them is wrong. Jane looks like Jane, since the comic Jane is also just a woman wearing normal clothes most of the time. Robotman just looks vaguely like the worst version of that character (Grant Morrison's shitty version), and Cyborg has cheap looking plastic stuff on his face that vaguely resembles what he should look like (and is wearing a tracksuit for budget reasons, which makes sense out of universe but doesn't mean that he actually looks particularly good). Negative man has bandages/glasses but doesn't look like he usually does in the comics outside of that (except, again, maybe he looks like Grant Morrison's crappy version).
Rita is especially nothing like the comic version in look or attitude, and outside of the wheelchair the Chief looks nothing like the comic character. The show also screwed over classic DP member Mento, who is NOT an old man (although he is sometimes crazy). I guess you could argue that, outside of Rita being nothing like Elastigirl in really any sense outside of powers and elements of her backstory, the biggest problem I have is Cyborg looking really cheap and the show taking too much of its look from the short lived, shitty Grant Morrison Doom Patrol run.
Again, to be clear, I really enjoy Doom Patrol despite its weird (and sometimes cheap looking) style, but its definitely not one of the DC shows that cares too much about looking like comics, outside of the stuff obviously inspired by Grant Morrison's run. That said, it sure as hell is more accurate then
Titans, and while Rita doesn't really resemble the comic version she's still more accurate from a character perspective then any Titans character is to their comic counterpart.