I just found out a solution that might seem irrational to some, but hear me out first... Its purpose is not generalization or standardization, its more of an lategame opener into more tactics and adjustments, for both sides of the game... Alongside it, this might even input a more tactical approach to picking Commanders (opening more options for some that were unplayable but provided alot of utility, but no lategame heavy tank).
My suggestion is simple... Why don't we make all nations have their doctorinal heavy tank (aside OKW Tiger 2 which is called in without a specific commander needed) an actual regular unit for them? Especially since it takes in the commander preview mod 11 CP to even be able to consider it as an option, and demands will be to have all, and literally ALL tech unlocked?
Unlocked after ALL lieutenant and captain research has been unlocked, alongside Mechanized officer
In case of Tiger 1 command tank variant, enables the purchase of both (similiar to the returning change of having both Sturmtiger and Tiger 2 ability on field)
IS 2 Tank or KV-2
UKF - BRITISH FORCES
Prototype Black Prince
All these tanks are limited to 1 on battlefield per player, and adding them into the fray, rather than making heavies of such a commander specific thing, we are opening more commander options for more Gamemode Variants... You would not be restricted to having hard focus Heavies on Team gamemodes, and having early midgame openers on 1v1 or 2v2 priorities...
This idea also does not disconclude the AVRE, ISU, FERDINAND,JAGTIGER,SEXTONS etc... Which will still remain Commander Choice tanks, but since they have such specialized spot in which you have desire to play them, they should remain Commander specific units, rather than regular High tier units.
For example, if this idea does get implemented, and I believe it would influence lategame gameplay quite nicely and a lot of other rush tech decision mechanics will be nulified (same what goes for commander patch preview ideas, that people will need to use mediums and utilize some things that are almost mythical on how unseen they are on battlefield), gameplay and commanders would be able to implement much more various additions for their picks and call outs.
Here are some examples (for replacements of their Heavy call ins):
Assault Support Doctorine - LeFH 18
Mechanized Assault Doctorine - Close Air support
Spearhead Doctorine - Assault and Hold
Lighting War Doctorine - Smoke Dischargers
Regarding the decision made, tank commander would get replacement
Heavy Cavalry Company - I don't think that there is anything more subjective to add to this company, since it needs something to work with its mechanized mechanic... So I would either suggest Easy Eight / M4A3 76. or in case he should be made a spearhead cavalry type, Calliope
These are my suggestions that would solve a lot of lategame spike, and reduce the egoistic necessity for certain commanders to be played (ONLY viability*) alongside already moderating changes for Lategame rush players, so they have CP requirements and mediums usage during mid game tier (this idea is being personally developed in accordance to current commander preview mod changes), while opening more variants to commander choices rather than blunt (I WANT HEAVY TANK) decision makers.
Thank you all who got to the bottom of reading this, and I hope you enjoyed it (and that this hopefully gets implemented)