Sentinel AC1: The anti-Pz B2?

Lert: The Pz B2 has been a beloved sealclubbing tank for quite a while now. Rare, tough armor, DPM, ridiculously agile with mediocre top speed and being always top tier make it undeniably OP.   However, with the recent influx of sentinels my Pz B2 might have found its match. I can't easily penetrate them while they seem to lolpen my Pz B2 at any range - whether or not they need APCR to do so doesn't matter to me. I've learned to try and avoid head-on fights with Sentinels in my B2.   Is it just a case of me now knowing the weak spots of the Sentinel yet? Or is the Sentinel WG's attempt to balance the Pz B2 without directly nerfing it?