GW did do a sloppy job with this release, but the new models and fluff are very cool.
The rules are severely lacking at the moment, but considering how AoS will receive regular releases over the next few months (40k releases are expected to take a break in the interm), then the game might be more complete come fall.
The new round bases mean that the new models can easily be used for other game systems, so I guess that's a plus. The lack of rules won't stop me from buying the models and adding them to my 40k armies.