It may be a price point issue. The price on the Verizon TP2 is quite competitive. It also comes with no case or screen protector for those that don't know. It also doesn't have the front facing camera of the Euro GSM version. None of the aforementioned downsides dissuaded me from buying the phone. The headphone jack is worth the trade offs for this version alone.
It may also be a space/packaging/reception issue. This phone has both a GSM and a CDMA radio, and the headphone jack. I would think this adds some EMI issuses, bulk issues, etc. May be why it doesn't have the front facing camera too.
I'm just saying that I don't think Verizon would really want to cripple the phone without reason, and the fact that all current CDMA released versions of this phone
AFAIK have no radio or front camera, make me think it's likely the second stated reasons: that other hardware changes prevent these feature from being (easily) incorporated.