According to,
https://etherscan.io/chart/hashrate it looks like its still pretty much at its peak.
If some pools are showing decreased hashrate then its most likely because,
1) According to some calculators, ETC seems 2x as profitable but this is due to an error and people are switching
2) Claymore stopped working at the current epoch
3) Some people using other non-claymore miners under Windows 10 might of ran out of GDDR
Pretty sure the E3 is still hashing away. Probably 1 more month left or so.