Flutter's new CEO Dan Taylor is counting on better products and more generous customer rewards to help convert FanDuel's improving engagement into stronger profits

Taylor's been at the helm for just five weeks and issued his first earnings report as CEO on Wednesday, with third-quarter revenue and adjusted earnings before interest, taxes, depreciation and amortization missing Wall Street's expectations. "We made some changes to the product," Taylor told CNBC in an interview. "Fundamentally, the way you win this business is by delighting customers, delivering the very best experiences and delivering to them in the way that they want, with the right overall proposition." FanDuel also launched a nationwide rewards program in September that Taylor said has "resonated really, really well."