To address Rifle Company in general.
It's worth noting the range increase on the Easy 8 means the accuracy and penetration at its previous range values got improved as well, so it's a bigger buff than it might seem.
And sorry, if you don't see a use for Riflemen flares or sprint, that's just unfamiliarity with the doctrine. Sprint also got a CP reduction so it's relevant during early mg42 and early light vehicle engagements.
I'd say even Rear Echelon Flamers are worth it now ever since reinforce cost for Rear Echelons went down from 25 to 23 manpower, not that hard to fit in a second Rear Echelon into your composition now, be it only situationally the best choice.
WP offmap got its cost reduced from 130 to 110 munitions to be in-line with Cluster Bombs offmap cost.
So yes, the doctrine got only soft buffs (with the exception of Easy Eight), but that should be enough to push it from "just not there" to being in a good spot.
All those are expensive muni options that cut into your killing power though, every time you use sprint,mines,flares,flamers you cut into your own muni economy to deploy bars. It's why their usage ends up being situational most of the time until lategame IMO.