This was a fun, but not particularly surprising issue. I don’t think many readers thought that Wally’s kids wouldn’t be the primary motivation behind his grudge against Barry.
I am sure the more zealous Wally fans will take issue with him being portrayed in a less heroic light than Barry, but with all the temporal shenanigans wreaking havoc with Wally’s mind, his unhinged behavior makes perfect sense. However, we’ll see if this continues.
Personally, I think everyone would have preferred if Wally, Linda and the kids had simply been allowed to headline the Speed Force book like Johns originally planned prior to the New 52, but I think most everyone will be happy by the end of this and we’ll have everyone back the way we want them, with NuWally filling Bart’s spot while he goes back to being Impulse.