We can play a game if you'd like. Most Soviets only have 5 capping squads instead of 7 too. There are advantages and disadvantages. CE models are straight up better than conscript models while being cheaper is the point. No other factions engineers have models better than their mainline.
There's no need. If CE spam was OP, we would had seen it in mass in either tournaments or high lvl games. Because, it's not like this didn't happen in the past with either Ro. Engis or RET.
You could argue that top players don't know or want to play like that, but i'll say we have enough Cpt Sprice type of players to replicate this kind of spam strats whenever they get out of hand.
Regarding the test, there are several issues.
Volk vs SP: not sure why u make them face 3 Volks vs 2 SP when the squad is 300mp and Volks 260mp) A closer comparison would be 2v2 and SP stomp Volks.
CE vs Con: no reason for either squad to push as they have the same weapon.
CE they are more expensive to reinforce (21 vs 20) and occupy more popcap (15 vs 14). 1 per squad and 1 per model.
170 * 3 = 510 vs 480 = 240 * 2
Anyway, who cares if CE can beat Conscripts, when you will never play Soviets vs soviets in automatch. Something you forgot about why CE is not a thing as well, is because any light vehicle rush will push you back to base.
PD: CE are completely fine. No other factions have Conscripts as their main line infantry.