I agree, though the basic dollies themselves can prove very versatile. The same body in dress coatee can be used for all the conflicts you mention : Afghanistan with a covered belltop shako, the conquest of Sind with a peaked and curtained forage cap, and the second Sikh war with a covered Albert Shako. Ditto for British infantry in shell jacket : only the head needs to be changed.
Should the Empress Sikh war become a reality, the Maori War Brits can be recycled through a simple change of headgear. I like the fact they don't wear the HEIC waistbelt (which not all Queen's regiments seem to have adopted during their stint in India), whereas Michael Perry's Foundry Brits all have it.