If you look at the distribution of blitz ratings here, you will possibly notice that 1690 is pretty far along the curve.
Your complaint is like complaining that you have to heat your tea water to 212 degrees in the United States when you used to get boiling water back home at only 100 degrees.
PLEASE, how it is possible to do nothing against the Time-Cheating on this Server. Since 1 Jear nothing happend to solve this problem. My real Blitz-Rating is about 1900 DWZ (not Elo) and on your Server I have only 1690 if I am lucky because of all this Cheaters here. What are You doing the whole day. Please answer me and be serious.