Indeed a great bonus for TWO weak guns, exclusively at CQC, exclusively in cover, compared to accuracy bonuses for ALL weapons, picked up included, all other engineers have.
You're clowning hard now, this is completely meaningless for your tripple LMG long range scenario and sounds good exclusively on paper.
Since you insist down the same path and continue to posting only in an attempt to prove me wrong I have little option left but to shown how many things you gotten wrong so far:
... it falls short badly against vetted inf.
Proven completely wrong Vet RO.E where able to beat Vet grenadier/Vg with easy
 ...Their damage scaling is EXCLUSIVELY upgrades.
..
Proven wrong since Ro.E get around 23% more DPS when in cover at vet 1
... despite high values, its very minor and insignificant increase compared even to 15% accuracy of pios/CEs.
First error Pios/CE get 20% accuracy at vet 2 not 15
and 
23% more DPS at vet 1 in ot "very minor and insignificant increase" to 15% accuracy it even more than the correct 20%.
I also need to point out to you that Pioneer/CE do not get rack weapons, they get the flamer upgrade instead that does not benefit that much from accuracy. 
Now it is pretty obvious that if there is someone that is "naive" and a "clown" that is actually you.
Contrary to your little theory about Ro.E not a geting accuracy bonus  "and falling sort badly" the fact remains that Ro.E. can fight and even beat axis mainline infantry once vetted/upgraded.