Kim Basinger and Martin Bregman said that it was Val Kilmer's fault that the movie didn't turn out better
http://movieline.com/1994/01/01/no-regrets/2/
Q: Val Kilmer and The Real McCoy?share
A: That's another story, not a real happy one. The story we read and the film it ended up being don't match. What happened was the reediting of the project, because of creative differences between the lead actor and the director and [producer] Marty Bregman.
http://articles.latimes.com/1994-01-02/entertainment/ca-7715_1_alec-baldwin-jennifer-lynch-kim-basinger/6
"This film was originally a love story that turned into a caper movie," she says. "I blame myself in part for this. I fought to get Val Kilmer in the movie, but he just wasn't into it. It just fell apart."
The film's producer, Martin Bregman, also grouses about Kilmer. "He almost tried to destroy the picture. We had to rewrite it because of him," says Bregman. "But Kim was terrific, a real pro. Never late, always very prepared, always very helpful and never an ounce of trouble. She was a classy, nice woman, who always brought cookies to the crew.