I think a lot of people got spoiled by the insane amount of exploits that 1.80 and 1.81 had.
The window of opportunity is closing as far as user-mode exploits. I doubt very seriously that there will ever be another time where three new exploits get dropped within the space of 60 days.
Think about the regular PSP exploits that came out back in the day. GTA - LCS, Patapon, Grip Shift, etc. There were still fewer exploits for the PSP released in an average year than there were in just one season for the Vita.
It isn't realistic to expect multiple exploits for the same firmware. The scene might have been a bit generous in the past few months, but with Coldbird leaving the scene over leaks, and the fact that SOME asshat tries to ruin every ninja release that I have seen so far, I think we're lucky to even have the UNO exploit.