Make sure to check out today's hotfix as it addressed a major issue with veterancy.
http://community.companyofheroes.com/forum/company-of-heroes-2/company-of-heroes-2-general-discussion/67-coh-2-changelog/page4
Of note, Riflemen did not suffer from this issue, so they effectively scaled significantly better than all other core infantry. We believe this may have significantly skewed player perception in a number of areas, we also believe the resolution of this issue will greatly improve the overall gameplay.