It's true they are not dogmatic about the 7000 years anymore. It's true they refer to the periods in indeterminate terms. It's true they don't think the creative days were 7000 years long.
What you will not find in WT literature however is any rejection of short timescales for the age of the earth. You will not find any outright acceptance of the scientific concensus.
I would agree that few younger witnesses would think in terms of or perhaps even know about a creative day of 7000 years but if that's what an individual witness wishes to believe, as some old timers still do, then there is nothing in current WT literature to say they need to change their view.
It's typical WT obfuscation about the acceptance of scientific fact and concensus - keep it ambiguous, keep it from promoting confidence in science but avoid outright conflict with science so the sound bites for the public can be kept sweet....