I think its good for the most part, I think the new stuff is interesting and I can't wait to see it explored within the confines of the main continuity, and I think other series also do well as a bit of an appetizer of things to come or just a general idea of how they write.
However there are some complaints, for instance certain stories and timelines don't match. Take Nightwing for example, in his own solo story he is running the Gotham Resistance but in Titans which I believe is set only a little later he's escaped and become Deathstroke. Another issue is that unfortunately because these are treated as set ups for Infinite Frontier we have no context for stories, case in point Tim Fox. Yeah, he is the new Batman alright and I like his story so far after two issues but we are dropped in after he has been Batman for a while and we have no real idea what led him there or how he was trained to be Batman. Now we do have a series coming up in Second Son written by Ridley showing his origins, but doesn't help us now when we see him go out as Batman or later join the Justice League. Same goes for Yara who again I like, she's cool but we find her after she has been Wonder Woman for a while with no context to how she got the role especially when in a backup to Immortal Wonder Woman we also see Nubia as Wonder Woman. Again, I get that build up will happen later but it doesn't help now.
So I would probably grade the whole thing a B-, some good stories and interesting looks at upcoming books but could have used some cohesion and a few recap pages or something.