T70 was heavily reworked in 2016 and had a major recon nerf in either late 2018 or early 19’. 2016 gave it an extra 80 HP with substantial AoE nerfs.
Ah, missed those. For some reason the patch notes arbitrarily switch between "T70" and "T-70", making the search function useless.
The changes were:
Manpower cost increased from 200 to 260
Health increased from 320 to 400
Crew repair removed
Reload speed increased from 1.8 - 2.2 to 2.1 - 2.5
AoE damage reduced from 1/0.35/0.05 to 0.8/0.35/0.15
Scatter Max increased from 1.7 to 2.5
Distance scatter offset reduced from 0.25 to 0.15 (this improves targeting)
Veterancy 3 decreases weapon scatter by 20% (accuracy vs infantry)
Coaxial MG cooldown decreased from 5 to 3
Coaxial MG cooldown multiplier changed from 0.5/1/1.5 to 0.75/1/1.25
Coaxial MG accuracy changed from 0.38/0.33/0.28 to 0.38/0.355/0.33
Coaxial MG reload duration reduced from 4-6 seconds to 3 seconds
T-70 Recon Mode now also allows the T-70 to capture territory with veterancy 1.
Capture Point ability removed.
And then slightly later
Veterancy 2 recon mode bonus removed (68.5 sight from 95 when fully vetted)