Good News: You will be able to fully respec. Bad News: You probably still can't afford it.
First, be aware that the influx of so many heroes into the Championsverse has stretched the fabric of time and space even thinner than it was previously. As such, it is now possible to completely retcon your character from start to finish, regardless of level.
The basic idea of how it works still holds; that is, for each step you have retconed your character, the next step becomes more expensive. Now, allow me to make an important clarification of something that has always been true: points of any kind that you have unspent COUNT AGAINST THE COST OF RETCONNING another step. In other words, the cost of retconing the 5th of 5 powers is exactly the same as retconing one power when you have four other powers selections unassigned.
Second, the cost of retconing now scales in relation to the potency of what you are retconing in a more logical manner. Previously, the cost of retconing a two point advantage was double the cost of retconing a power. The new ratio is as follows:
Power 3 steps
Advantage 1 step per point (zero point advantages dont increase cost from previous step)
Talents 2 steps
Characteristic Focus 4 steps
Travel Power 2 steps
End Builder 1 step
Innate Talent 4 steps.
Each step you go back increases the cost of that step and all subsequent steps.
Additionally, the cost progression of each step is now different than it was previously. Your first few steps will be, comparatively, rather inexpensive compared to what they were. As you step deeper into your past, however, the cost will escalate. The final result of this is that retconing back four or fewer powers will now be, in total, less expensive than it was. Retconing back further than that, however, slowly becomes more expensive.