i could say im having similar experiences, i've been working my balls off over the last month of so gearing up, im now in full s2 with s3 chest, have neck, belt, bracers, s1 wep, s2 shield, 41 badge trinket and the 30k honor trinket with the +dam on it. I sit on 880 spell damage and 380 ish resi. Now, thats not bad tbh.

This week i've managed 5 : 5 in arena, i started on 1377 points and now im on 1401 exactly. The first game i won got me 23 points, i think i played it really well, the others i won were quite close, but the 5 i lost were all over the place, but the team make up i found v hard to beat, i had people ressing on me and all sorts, dam priests, druids and warlocks giving me the run around, a complete loss of focus fire :/