I am not sure how 25% increment in exam fee is justifying for no changes in exam pattern or no updates in break options. Nothing is changing except people will be able to retake exam once again. I am not able to understand gap behind this increment in fee

From GMAC perspective, I think Online GMAT is in its favour. GMAC doesn't have to bear cost of Pearson exam centres, AC, machines, people etc.
Yesterday, I did a CR in which it was mentioned Income= Revenue - fixed cost. Manufacture didn't pay salary for 6 weeks to its employees so Manufacture's income increased.
I can apply same analogy here

, and second every person who said GMAC is back on milking money.