MIAMI, April 30 : Max Verstappen said he was taking his time in deciding his Formula One future and called recent rule changes merely a 'tickle' rather than what was really required. Red Bull's four-times world champion is no fan of the sport's new engine era and has suggested he is unhappy enough to walk away. The uncertainty around him has increased after McLaren announced the Dutchman's race engineer Gianpiero Lambiase would be joining them by 2028 at the latest. "I still have time and I'm