Hi Chris,
I see now, it's the EBB status that's the cause here. Only our original 10,20,30, and 50 GB plans are eligible for the EBB (and soon to be ACP) discount. If you disenrolled from the EBB/ACP discount to switch to the 45 GB plan, that would be $110 for the new plan vs $69 you'd be paying starting next month for your current 30 GB plan.
That's almost a 60% price increase for 50% more data in your situation. If the ACP stops or changes on its own, perhaps then you may consider upgrading to one of the new plans.
-Liz