Abo - Can you achieve the differential pricing you need using the current power of the pricing feature for multiple registrants and / or the use of custom fee fields (ie Registering as a couple?)
If DT Reg could be changed to allow 1 as the minimum for a ‘group’ registration then admin can make the choices back-end and reduce the number of screens for the customer at the front-end:
Min 1 & Max 1 = Has to be Individual Reg
Min 2 & Max 2+ = Has to be Group Reg…. so start front-end with ‘How many Registrants?’ (& skip that totally if Min=Max)
Min 1 & Max 2+: Could be either - so go straight to 'How many people are you registering?' – making the current 'Individual or Group' screen redundant