Did they announce it would be open with the park?
Not anywhere I can see, so yes, I do expect it to be a construction site, even if the rest of the park opens this week...
2 months since groundwork was going on as well... That's a worse construction window (if they aimed for opening) than any of Merlin's stuff... Logic dictates therefore they were not aiming for a opening day jobbie with this (especially as the Flume came from Camelot, hence a decision no doubt waited on whether or not that would've been coming along to the park)...
Indeed, this is a HUGE investment for Oakwood, let them build it in their own time and judge the FINISHED product... Not the current state (with it's surprise indoor section, was not expecting that)...