Neither would ever fail to penetrate previously, and neither would ever not get penetrated by the AA HT. And this won't change. The only actual change is thus acceleration and +5 fuel cost. Meanwhile the insane, 50% higher than ostwind DPS WITH FREE SUPPRESSION, is still there.
It's a surprising change. It had a suppression value of 0.4 before they removed it altogether in the Alpha due to overperforming early game. Not only did they add suppression back, they increased the damage penetration, and ROF of it, so it's even more powerful than it ever was in the Alpha. It'll be a great way to hold territory mid-late game (or early-game for those high risk, high-reward takers), and I can see the unit being hard to dislodge and risky even with Medium Tanks. AT guns would be the best viable option against it.