Has something changed to the root scoring algorithm in last update?
I had a bunch of rooted solutions on F3 that all gave me 360i points, i was quite unhappy/confused about getting 360i on them as they were significantly faster, in todays update they all seemingly inexplicably went up significantly to as much as 397i for one (basically the score that I originally expected to get), but what triggered this is beyond me as no new non-root optimal solutions appeared. Its hard to try to get the most amount of points if I don't know what rewards points and what doesnt :P
Before the update, optimal solutions required ~1200 cycles and 20-24 cost. After the update, we know that we can achieve ~1200 cycles with costs in a wider range 20-112 and still be optimal - that is, cost plays a lesser role in achieving optimal solutions. Consequently, rooted solutions that are faster at the expense of having higher cost get better scores now.
Getting 360i for a rooted solution suggests that it was treated equivalently to an optimal solution. Is the cost*cycles product of your solution around 24*1200?
I see. Since your solution is neither superior nor inferior to any of the optimal solutions, it's scored based on cost*cycles. The product was greater than 24*1200, so it was given the score of an optimal solution, but rooted. Now it's compared against 112*1200, so it gets a higher-than-optimal score - because its cost*cycles is better than that of the newly-added optimal solution.