If you route direct to DAYNE from, say, Clacton, it increases the chance of a hold at DAYNE to lose the height. Due to the geometry of controlled airspace east of Manch, it can make it awkward for Manchester Approach to give continuous descents. while keeping traffic inside CAS. One of the problems is a portion of the TMA known as The Camphill Fillet, where the base is FL65. Routing to TNT works better. NANTI, for EGGP is not usually a problem.