I do not play custom games. No one really does since online is what most people play.
1v1 or online matches, there are no blizzards.
There is more reason as to why it should be removed since mulitplayer is more popular and it should be adjusted accordingly in that manner.
It be adjusted according to its current rules and gameplays.
Blizzard no longer plays a role, therefore it should be removed for something else or just remove for a price decrease.
I want to use it willingly, with some purpose and viability which it currently has none, in multiplayer.
The cold immunity is not hindering the chance of the upgrade receiving a change at all nor it has any weight on the the unit balance.
There's no point in removing it.
People often mistakenly assume that because a similar unit or weapon has a certain cost attached to it, they should be mirrored in another completely different faction.
To top it off, people think that double upgrades are just 2x the cost of a single upgrade. It has always been that cost/opportunity of a more expensive upgrades tends to have a discount on them.
Finally, there's the unit which is intended to receive the upgrade and what they gain or lose by having them.
Ex: compare PG upgrade. It originally was 120 x 2 when probably the cost intended for a single one was much higher. Look at Storm/Volks originally PS cost. You can see how been a much expensive squad can affect the value of it.
I believe what should be tested is making the upgrade not exclusive with minesweeper. That change alone would make the upgrade see way more use. You never want to be without a sweeper at all and for most strats been at 2xSP is less viable than just buying the mechanized repair upgrade which cost no pop.
I'm not opposed to see further changes on Sturms, but i really think that a change that small will have bigger repercussions. Been able to have an easier time vetting allowing the unit to get access to stun nades as an example, will push the units further than just reducing the cost of the upgrade.