I did post to the Apple Support area (where IOS8 is not even registered on the website as a platform characteristic - somebody needs to update that also).
As to when and where the problems are occurring. The copy from Safari and past into Notes is a good example of where things have changed.
First of all Notes seems to support rich text from a PASTE standpoint but not so much from an "edit" standpoint. But that is not the real problem. The text select to copy functionality in Safari on iOS8 is not as robust as before. The SAME websites that I visit and some that I manage do not support simple large-block text selections for copy (large being 2-8 paragraphs of text).
The observed effect is that small (single sentence or single paragraph (sometimes up to 2-3 paragraphs) may be selected and successfully copied. But blocks that go from 5-10 paragraphs will generally "select larger" as the select-drag operation is conducted on the iOS device. Then the ENTIRE page text is selected which is a No-Op for copy. This is a condition that absolutely changed in the iOS8 upgrade. It worked wonderfully prior to that.
This select-to-copy condition make it very labor intensive to copy larger blocks of text and forces copy operations to be limited to 1-3 paragraphs at a time.
The other error I have encountered is with touch-to-select operations within IOS applications. These are applications that have text-select features that previously worked by simply selecting the text of interest (to highlight for example). For those conditions I have reported the error to the application vendor. It is IOS related but not quite the same problem as referenced here.