Don't panic until you see the actual tier structure. Consolidating three into two increases the structure (duration) of the tiers but to what extent, we won't know until the next billing cycle.
What got my goat was an announcement a couple months ago about someone slipping in a $25 charge when going over into the next tier even if only slightly. It may even apply across the board no matter how little you use (I forget). No one noticed it as it was buried in the fine print and a lot of legislators were pissed about it. Whoever put that in needs to be exposed as it was a handout to the utilities providers.
All the best,
Nonoise