I think the name you are looking for is Paul Pressler.
I know about his terrible reputation for a very long time. He was responsible for DCA and it was approved his watch.
I read about him back in the 2000s and really should've been investigated due to his attitude with maintenance at Disneyland. He turned multiple Disneyland attractions into time bombs due to his no maintenance attitude. Him and Cynthia Hairriss did very bad things at Disneyland. Disney had to settle a wrongful death lawsuit with the guests family receiving money from the Big Thunder Mountain railroad actually becoming a runaway train due to no maintenance.
The thing is Eisner appointed him.
As Far as WDW goes, some of the stuff had no inkling to Paul Pressler due to time frame.
I know Paul had some say at WDW due some of the stuff like Spaceship Earth not becoming a roller Coaster called time Racers was due to him. The catch is he did not have a say for WDW not as long as he did at Disneyland. He had almost 4 years for influencing stuff for WDW.
Paul was not President of Walt Disney attractions aka now known as the Chairman of Disney Parks and resorts before December of 1998. Primeval Whirl was under Pressler's reign like you said. The 3rd version of Imagination ride was under his reign also.
Pressler had nothing to do with Enchanted Tiki Room under New Management since the original Tiki room at the Magic Kingdom closed down in 1997. Enchanted Tiki Room Under New Management reopened in 1998 before Pressler had a chance to get his hands on this.
He had nothing to do with with the original Imagination closing down and getting a 2nd version of the ride since that was planned before Paul became President of Walt Disney attractions just 2 months after the attraction closed. The 2nd version of the imagination ride opened up almost a year after the first version closed down.
What happened for the 2nd version of imagination was an imagineer blunder, not a management issue. I think you know the imagineer who did that since he is right now the head imagineer responsible for Epcot's makeover.