I agree with George both in the rule as written and the handling of fieldcraft.
We house-rule it that certain troop types (Boers, Pathans etc) with fieldcraft can go to ground and then fire at half effect (‘sniping’)while remaining GTG.
However, they may still be fired upon in the opponent’s turn after they fired (at both long and short range) but needing 1 more hit than usual to inflict a kill. So, Pathans hunkered down in stone sangers and sniping at long range will only suffer one kill for every 5 hits inflicted on them (2 for long range, 2 for hard cover and 1 for GTG).
Pinned units stay GTG and cannot snipe. Units Attacked while GTG fight at half strength (we’ve always assumed there’s a missing ‘with’ in the 4th bullet point on p21)
It does encourage historic tactics on both sides - Brits on the NWF would engage with artillery and then storm up the hillside with fixed bayonets for a good reason.