Effective Hit-Points have been discussed to completely mislead discussions. It blows up numbers with a massive effect to higher proportions making units look as if they are OP while In fact, they're not.
I don't really see how these stats are misleading, or how they would blow up numbers. They are simply the only way to effectively compare units. In the case of infantry durability versus small arms, with wildly varying factors such as number of models and target size, effective hitpoints is the only way to compare their durability.
In this case, Commandos do have relatively high durability despite not having very high combat bonuses from veterancy, because most of their power comes from their base stats. Unlike other units that get +30-40% DPS or -20-30% target size from vet.
Of course there are certain nuances like that EHP is based on average RNG, but so are almost all stats.