Ignoring them is not a feasible option. My phone is not running at the same speed it was before. The lag and lack of battery life is ridiculous. If the phone were like this before I wouldn't have purchased it.
If anyone is having issues after the OTA, then something is wrong. I know everyone always hates to hear it, but I would have done a factory reset already if mine wasn't right after the OTA. And if that didn't fix it, then I'd get it exchanged.
The phone should be better after the OTA, not worse.