Not sure where you have been but that is normal for the current 4.4 roms for the Ultra. If you want 35k scores you need to be on 4.3 Sony or wait longer to see if it gets up there.
I have not seen other benchmarks so it would be interested to see if it is only one Benchmark showing this decrease or if it is all.
I am sure someone will come up cry benchmarks are useless etc...and if it is one then sure, but if all of them are reporting loses, it doesnt take a genius to realize there is indeed decrease performance.
Now if you can or cant tell it on daily usage that is another story.
So yeah, I would love to see other scores reported. Like on Note 2 I recall my 3Dmark scores were always higher with CM roms but of course, different phones and Roms under development.