The updates look really good and the few screenshots of Xen capture the soul of what it looked like almost 20 years ago, with now modern looks.
They should have avoided making this type of definitive comment back in June though (the game costs money; it hasn't been free since 2015 and there are expectations to be met):
Unfortunately, as some of you may have already predicted, we are going to need to push back our planned release of Xen to later this year, in December. We know that this is not what anyone would want to hear, but after taking a long and hard look at what we want to achieve, we have decided that this is for the best. We do not want to compromise on Xen’s quality in any way. That said, we consider December to be a do-or-die deadline.
And while they are at it, they shouldn't have postponed to December the date / timeframe when they plan to say when Xen will be ready; it doesn't sit right to announce a delay with a delayed response.
On another note, I can't help but wonder if this delay isn't to make the game's release coincide with the 20th anniversary of the original (well, not to the month, as that would be a year away still).
And while we're at it, maybe Valve has something up its sleeve to commemorate Half-Life's 20th anniversary too... ahem. Oh well, one can dream.