I love going through the start dates from 1066 to 1337 and see the map change. CK2 is like a (rough and adjusted [for gameplay purposes]) encyclopedia. I also prefer the high and late middle ages as start dates. I'd find it sad to see the option of finetuning my start day scenario on a (at least month-to-month basis) gone. All the research has already been done for CK2, so why give it up and dpreive us of all these options?