Yes, it's pretty obvious by now that they're not going to throw in big changes 2 weeks before the tournament. Simply put, when you throw in 20 new cards plus dozen of balance changes, you're bound to have to balance the game again after 2-4 weeks of new data, because there's no way to get it right right away. That's what happened with the OB patch, balanced in July (balance took longer and 2 patches to happen because of how massive the number of changes were though). So introducing all those changes now would mean that it would be very hard to get the game balanced properly by the tournament. It's better to let the tournament pass, patch right afterwards, and have the time to gather data and balance in the following weeks in September.
CDPR is most probably going to introduce to us the remaining cards in the following to weeks, then do a stream, and we'll get the patch late august /beginning of September.
Also, I can't really agree with anyone complaining that CDPR isn't giving an exact ETA here. They already warned that during Beta such thing would happen, so except if they do that after launch, I don't see what's the problem. Anyone not okay with bugs, big changes, balance problems, delayed patches or seasons shouldn't play a game still in Beta stage.