Ehh, Russian experiences from 1905 'reformed' their army is extremely debatable. Or you are being sarcastic, I couldn't tell.
Two items would be:
Adequate trenches. The Germans were not digging deeply or often enough in the early months of 1914. most rifle battalions went to war thinking shallow rifle pits, or shallow trenches were good enough. ...and they did not have the veterans habit of digging the instant packs dropped and a defense line deployed. They learned fast and hard, but in the opening months they suffered unnecessarily from enemy artillery fire from this poor habit. Conversely the Russian infantry started digging sooner and dug deeper. Continual slit trenches in a hour or two after the the battalion spread out into a defense. The Brits had the same disciplined habit & dug like rabbits.
Better masking artillery. The German heavy or foot artillery understood and habitually used masking terrain and indirect fire techniques. The light artillery of the infantry and cavalry divisions, specifically the 77mm caliber cannon batteries deployed to fire exposed and aggressively close. They were much like the French in this respect. This overly aggressive exposure of the division artillery for both the Germans and French got them heavy losses in the first months of the war, in cannon crews and horses. I've found cases for both side where entire cannon regiments of 30-50 guns were massacred when attempting to deploy on forward slopes & open fields when exposed to enemy MG or cannon already emplaced. While not completely consistent the British and Russians were habitually using masking terrain and depending on indirect observation with their division light artillery.
In both cases of the Brits and Russians the two items use can be traced to their relatively recent experience in other 20th Century wars. Conversely the French and Germans lacked recent experience, and failed to learn from the Balkan wars or their colonial policing. I could dig out old notes, and some books and spend several hours cataloging Russian army improvements on the experience of 1905. Probably with better leaders at the top & making the officer corps a true meritocracy, vs a privilege of the men of the right families, the Russian army could have benefitted even more from its 1905 experience.