It might just be him making excuses for the film's lateness but his comments recently have been consistent, like this other recent one:
It's part of the process. And when you have a character as famous as Blade, and an actor as famous as Mahershala, everything that happens just gets a lot of attention. I'm sure you've heard us talk about, we were struggling finding the perfect reason for Deadpool to exist, for the third Deadpool movie in the MCU, and then Hugh Jackman called, and it fell into place. Sometimes you need that magic thing that falls into place. And sometimes it happens – sometimes it takes a day. Sometimes it takes two years. Sometimes it takes 10 years. But that's what you really should be waiting for, until you make something.
It does sound like they are trying for quality iver quantity. Which would be a nice change.