That's a good point. I don't know...range? Did Relic not comment on this at all?
To clarify, this quote is in reference to the Pak Howie.
You pick a Howie now if you proceeded beyond the 6 minute mark without a mortar and want better indirect fire. You pick a mortar if you unlocked Lt and you must have indirect fire NOW.
The mortar is not a must build, the USF 3 rifle opening is just as powerful as it was because OKW does not get a T0 MG. However, now instead of teching for nades and eating up munitions you can choose to get a mortar to provide smoke instead. However, you will pay a higher MP (and drain for upkeep) and you will need to set up to fire. In return the mortar can also do some damage and you save munitions, which you will need, to deal with volks AI.
The mortar is not that good, its ok, but its not that good. It just opens up a new range of build orders for USF so it is not always: Rifle, Rifle, Rifle, tech.