It doesn't matter if it HAS been open "all the time" for a while (which it hasn't).
It doesn't matter if it has been open MUCH of the time for a while (which it HAS).
During a "soft opening" there is NO WAY of KNOWING in advance if an attraction will or won't be open.
They will have a press event(s) that are closed to the public (probably the night before... and maybe earlier than... the April 7 official opening date).
They might have to do some "technical adjustments" and not open the ride at all in a given day or two.
They might decide to give it a general "sprucing up" (or just KEEP it clean) for the press event(s) and official opening.
So, will it be open on a day that YOU are there?
Might be, could be, probably will be...
but if its not, it would not be too unusual.
You just have to CHECK (frequently) when you're there.