Putting aside weather or not you think this reboot was a good idea (i didnt) I think this book was pretty good. It sort of strikes me as "Ultimate Justice Leauge" very decompressed very heavy on character development over action. I liked it. I just wish it was more of an Ultimate JL instead of the new JL. I mis the old DCU
Ultimate books felt like a distraction after while. I think it made Marvel unfocused. Marvel made this messy Civil War thing that still doesn't make sense. Civil War wasn't written well at all to say the least. It's like 'everything changes' every issue but they obviously didn't know what to do with this big concept. I can't even read Spider-man anymore it's so bad. I know people enjoy Big Time or whatever, but mentally I'm still waiting for them to pay this stuff off. Tony Stark didn't seem like Tony and Cap wasn't anything like Cap. Spider-man was just terrible. After the 'unmasking' that was nothing I felt Marvel was just going to tell fans they had something big for their Spider-fans and just not pay anything off and it would get worse and I was right.
I use Civil War as an example because it was clearly Ultimates-influenced. I don't think the characters in Justice League will change that drastically. I think Marvel's writing suffered under the Ultimate line. They had the same people working both lines.
That's why I'm happy to be read some DC now. The writing seems much more together.