it's worse than that, grens don't need to ... spend 400mp+45fuel in upgrades just to have basic things like grenades and lmg's
Not quite my friend. I've done the numbers on this:
For grens you spend 80/10 (T1 cost - included because brits don't have to spend anything to access IS) just to access them, then 100/45 (BP1) to access lmgs, nades.
End Result: 180 mp, 55 fuel.
UKF IS:
150/15 : racks
150/15 : nades.
End result: 300 mp, 30 fuel.
Overall, seems ost is supposed to spend more fuel and UKF more manpower. (I did not include the squad size upgrade because, if that is included as well, then the IS becomes superior to the grenadier so its no longer a basis for equalizing the costs)
Of-course this doesn't take into account the faust, but then UKF isn't designed with infantry with snares, and have access to other upgrades (Squad size) which grens don't so the argument could swing the other way too. Which is why I haven't included it.
If we include a hypothetical cost of 100mp 15 fu as hypothetical ostheer squad size upgrade and 125mp 25 fu (Soviet At nade price) as hypothetical UKF IS snare upgrade the new, hypothetical costs become:
Ost grens: 280mp 80 fuel
UKF IS: 425mp 55 fuel.
Again, one side has a mp advantage (145mp), the other has fuel advantage. (25 fuel)
Whether that is balanced, I leave for everyone here to decide. I feel it would be fair to equalize the costs however.