Great question. The quick answer would be yes, positive feelings that have been kept submerged because of the inner blocking to negative feelings will now be free to come into awareness. Your example of strength emerging after victimhood is released is excellent, and this could be important for you in your psychological unfoldment. At this stage, you are working on clearing out the suppressed negativity, and flashes of strong positive complimentary feelings are an indication of successful work, and you should allow yourself to go with the positive and fully appreciate and integrate it.
However, there's more to it. What you have described is still operating on an ego level. This is the level on which popular psychology as well as most current New Age thinking operates. You don't want to forget that, on an ego level, feelings are always dualistic, meaning they are complimentary and depend on each other for their existence. Moreover, your comments suggest that you still have an attachment to the positive and an aversion to the negative.
There's a place where, having accepted both positive and negative, that a genuine transcendence occurs. This means you are no longer tied up with being controlled and dominated vs. being strong and free. The genuine transcendence of any center does convey a type of unconditional 'positive' experience. In other words, the ultimate goal is the middle path, neither being compulsively attached to the positive nor avoiding the negative, where you witness both.