Seems like you lack a tone of information from other factions.
1. you calc the tech cost to a motor emplcament? than lets calc all thtech cost to get your first ober out...it should be around 140 fuel and a tone of manpower.
2.worse at option than ost? what are u playing? UKF has handheld AT WITH AT nades combined on cheap squad; has UKF sniper with critical shot; has AEC with critical shot, has superior AT 6 pdr, has FF with high alpha dmg and stun and 60 range with turret, has really good mediums and KT HP like tanks, and little pershings,
3. UC is one of the best early LV ingame..use it
4.MG42 and vickers are on par---vickers is better in cover/ houses and make alot more dmg and MG42 supress faster..which end in less dmg since supressed unit get less dmg
1. 450MP is 2 squads of inf secs but is also immobile so it’s a straight downgrade from all other mortars
2. Panzershreks ignore all medium armor if allies while PIAT can bounce off OST p4 but sure have the PIAT is clearly better, find me a player who doesn’t have P4 or a pack out by the time you get an AEC out, 6pdr and pak40 are basically the same except for the sabot round increasing penetration it lacks against tigers, firefly is slow and immobile and has the longest reload of a TD and is out classed by even the SU-85 which can self spot, you clearly never used a Cromwell because they lose in a 1v1
3. Very situational unit
4. You got a CQC to combo with the MG42 suppression
Back on topic mortars are lacking in general for their job at such a hugh cost due to being unable to move and its counters