Hyperbole much? Infantry fights do not last mere seconds.
We are talking about what happen when one increases lethality and that is exactly what happens.
Of course there is a reason to plan attacks carefully if your infantry won't survive for too long outside of cover. It makes flanking, moving from cover to cover, covering fire, using smoke or other abilities, etc. mandatory rather than just charging straight in. That is what makes the game tactical.
Not if they are going to die while moving to cover. This exactly what was happening while trying to attack IS section in cover. They would drop an enemy model on approach and the fight would be over before it began.
CoH2 already has that middle ground. Infantry fights generally last long enough to reward cover and still allow for proper assaults, while punishing bad positioning or just getting caught out of position. And not because squads out of cover get melted in seconds, but because they'll usually drop one or two models before recovering so that they can no longer win that fight.
Not really it was in a middle ground when Relic left the game but the lethality of units has been increased and timing of powerful has become earlier. I sort there has been a power creep.
There are many cases where one can kill full HP squads even when they retreat at first sight.
Absolutely nothing changed in infantry TTK over the past 2-3 years, except for a handful of specific units that had their DPS or durability individually tweaked slightly.
Are you serious? Do you want me to make a list of how many buffs infatry weapon have received?
How about doubling the DPS of SVT?
How about giving ST44 to VGs?
How about buffing the DPS of Assault grenadier MP40?
How about buffing PPsh?
How about buffing G43?
How about making PG/Ober available earlier?