I can't comment on the comparative sizes of early war 1914 infantry platoons versus WW2 platoons. The latter is not something I am anywhere near as familiar with. It was a revelation to discover that the Spearhead stand (WW2 ruleset) represented a platoon, with roughly the same frontage as a Great War Spearhead stand, which represents an infantry company.
Based on your comment (thank you), the large size of a WW1 platoon is compensated for, from a command and control perspective, by the much closer proximity of the sections. This did not negate the possibility of orders becoming distorted during transmission along the line but the ability to maintain flank contact was easier.
The bigger problem with WW1 skirmish actions is that the close proximity of more dense formations makes for heavy casualties if the platoon is targeted. Hence an off-table enemy machine gun section could completely destroy an entire infantry platoon in minutes. Likewise a heavy artillery shell hit could devastate a platoon.
FWIIW, skirmish actions are best fought as advance guard vs advance or rear guard actions in relatively close terrain. Early war, mid-war (Operation Alberich in early 1917), and late-war (German Spring offensives or Last 100 Days) are examples on the Western Front.
Robert
Always a privilege to get your thoughts, Robert.
A late WW2 Heer platoon (43-44) would have 3 sections of 9 dudes w 1 x MG42 (crew of 3), leader and 5 rifles in each section. Plus a platoon HQ of maybe 5 guys inc a platoon leader and extra MG42 team.
It's mind-boggling if this small formation had company frontage by WW 1 standards. To understate, in WW2 units were holding frontage by automatic firepower whereas in WW 1 they were holding it w bodies carrying rifles!!
Somewhere out there is - or should be! - a book on how the transformation of small unit infantry tactics took place in the 30's when the Bren and MG34 came into use.