They've been pushed back in the calendar so that the horses who do well in these races are not the competitive ones several weeks later in Louisville.
For those not familiar with past practice, the Wood Memorial used to be run 2 weeks prior to the Kentucky Derby, and the Bluegrass Stakes the second Thursday prior to the Kentucky Derby. There was noise about too little time between races, but the winners/good finishers had a lot more to do with the outcome in the Kentucky Derby.
We now have a Kentucky Derby based on old performances--with the requirement for graded stakes earnings, sometimes very, very old performances. Horses are hyped for something they did a month or more before, sometimes what they did as 2 y os.
Don't be shocked if we (once again) have a Derby that unravels much like the Florida Derby did, with horses expected to deliver a lot not showing much and surprises at the finish. That's just the way the schedule and the earnings rule now shape the race.