Same here, from 35-40 all the way down to 15 maximum and EVEN in best performance settings. UI problem or not, it remains even in the character creation and selection.
i5-3350P @3.10GHz
RAM 8.Go
AMD Radeon HD 7000 Series
Not the best equipement but it was playable before the patch, now the PvP and WvW part is unbearable.
Great work on the camera though !