Here is why:
"Pioneers
Our aim is to encourage positional play and combined arms, which the Wehrmacht faction tends to reply on more than any other faction. With an increase in sight (albeit still lower than pathfinders) we are allowing Pioneers to help spot for their HMGs and other support teams.
Sight increased from 35 to 42"
It is by design.
Actually Relic was going to give the extra sight to grenadiers and proposed pioneers instead...
Although this thread has a better title is there really a need for two threads with the same subject?
at the game start, UKF relies astronomically more onto positioning than wehrmacht does, but they don't get any minute 0 recon, do they?
Wehrmacht has competitive mainline infantry, extremely good support weapons (and possibly considered the best weapons of their class in the game, for their cost.) They do not really rely more on this notion of combined arms as you think, unless the wehrmacht player intentionally goes a build like support weapon spam, which isn't really rare admittedly.