Except that the T-shirt and house analogy is completely hysterical, as are you for buying into it. The buffs were all around 10-20% of one single stat for most units. Everybody got a T-shirt except for the Tommies, who got a 0.15% and a 0.05% T-shirt. Nobody got or lost a house.
Except that it's not 0.05%. It's a 50% improvement in RA because we're comparing the previous -10% RA with the current -15% RA. If a unit has 0.1 of a particular stat, and you give it another 0.05, it's not a 0.05% improvement. It's 150% of what it previously was. It's a huge performance improvement relative to the previous iteration of Tommies
And the moving accuracy buff is a 42.8% increase in moving DPS, not 0.15%. Your numbers are off by about 28,500 %.
Tommies have indeed been overtuned but not to the point where they're uncounterable. They used to be great in cover and bad when moving or out of cover. Now they're great in cover and still better than Volks/Grens when moving or out of cover, which is pretty oppressive given how early bolster comes online.