My effective hashrate on the pool is a bit lower with 11.2 than with 11.0 on GTX 1070 mining ETH.
There was no change on nvidia side. So your argument is not valid.
But beginning from 11.0 core code was updated. I have regression of hashrate beginning from 11.0 for my GTX-1070 cards. In 10.6 hasrate one of 6 cards is like the same, but beginning from 11.0, one or two cards randomly has less hashrate then others. For example my average hashrate is 31.7 per card. In Claymore 10.6 all cards have hashrate about 31.7 (a little +\-), but beginning from Claymore 11.0 one or two cards can have 30, 29, and less. It is strange.
So looks like something was broken in the core of miner.