Hm. Lots of generalisations thrown about in this thread. Let's have an actual look shall we?
Easy8
Hitpoints: 640.0
Armor: 215.0
Rear armor: 95.0
Max speed: 6.1
Cost manpower: 380.0
Cost fuel: 135.0
Penetration: 175.0/165.0/155.0
Scatter angle: 5.0
Scatter distance: 5.4
A straight comparison to a normal sherman is not viable. The easy8 has significantly better armor, penetration and accuracy due to tighter scatter profile. It is, however, insignificantly slower.
I am not sure whether there is a "max ceiling" on penetration so that even a 100% by the numbers can glance off armor.
VS Panzer IV (Ostheer)
Both need four penetrating hits to destroy one another.
The Easy8 is significantly more accurate.
The PanzerIVs penetration chance: 55.8f, 51.1m, 46.5f
Easy8s Penetration chance: 100f, 100m, 96.8f
Conclusion: Due to significantly better accuracy and slightly better mobility of the easy8, it is doubtful whether even 2 PIV's will reliably win versus one easy8. They can win, but not reliably. A single p4 is not a threat. The guaranteed penetration of every easy8 shot even at far range is the deciding factor.
Vs Panther
The easy8 needs five penetrating hits to win, the Panther four.
The panthers accuracy is even worse than the pIVs, easy8 has a large advantage here.
Panther has better speed and acceleration, as well as better range.
The Panther is guaranteed a penetration at all ranges (100%).
The Easy8s penetration chance: 60.3n, 56.8m, 53.4f
Conclusion: The Panther definitely has the edge at all ranges. The one outlier is the Panthers fairly terribly accuracy and the extremely RNG based nature of armor penetration. Any shot from the panther that looks like a "glance" visually is probably a miss that deals only AOE damage (I.e insignificant). This means that with some luck the Easy8 can win vs the Panther, but definitely not reliably.
VS King Tiger
The only stats worth mentioning is Easy8 penetration vs KT front armor: 41,1n, 38.8m, 36.4f
and the fact that easy 8 dies to 3 hits (the KT penetrates 100% if it hits and has good acuracy) and the easy8 needs 8 penetrating hits.
Conclusion: In a straight out static slugfest even two Easy8s will not win barring good luck. If the KT is flanked and circled without support, it is dead.
Other points of interest:
- Pak40 is a reliably good counter due to high RoF and excellent penetration.
- The Raketenwerfer is, in theory, almost statistically identical to the pak40 in terms of damage, reload and penetration, lacking only 10 range (50 instead of 60).
- The Panzershreck suffers from bad accuracy, long reload, lower damage and penetration (needing six penetrating hits instead of four). it still has around 80-90% chance to penetrate the front armor.
Summary: The issues with the Easy8 is its spammability, early arrival, and efficiency against infantry. It is a later half-midgame tank that invalidates all axis medium armor. While the infantry based AT platforms are theoretically a good counter, the easy8s strength vs infantry make the Raketenwerfer and panzershreck extremely risky to use, often killed or forced to retreat after one shot. This is especially noticeable with the raketen vs the pak40, due to lower range, smaller firing angle and lack of cover by the gun.
Given the number of hits needed to destroy the easy8, it can easily deal with two raketenwerfers and a supporting shreck on its own. Even increasing the price of the Easy8 will only serve to allow 2-3 to appear by the time panthers (or a tiger) are on the field for both factions.
Suggestion: Slight price increase and slight decrease in AI capability.
Edit due to afterthought: These suggested small changes should probably only be a stopgap to some sort of change in the callin structure. It is the callin mechanic that allows "spam" of powerful doctrinal units in inappropriate timing windows. What exactly those changes should be is a discussion for another topic.
Note: I would strongly suggest that anyone posting about efficiency vs different targets or statistics actually check these and do the numbers. They are easily available on this site http://www.coh2-stats.com/ and a simple google search explains how to do the calculations.