About cochlea implants...
"maybe you would feel that your child had a right to full access of that rather than be forced somewhere between the hearing world and deaf world"
The child is not really somewhere in between. They are still deaf and will always be deaf even though the implant allows them to hear if they wish. The implant allows them to "join in" with the hearing community.
"am I right in thinking that cochlea implants don't provide "normal" hearing???"
Apparently it is a tinnier sound but you can still hear things like the wind in the trees etc.
" a child they would prefer to be deaf in later life, they could always have the implant removed"
The child will always be deaf - if they don't want to hear, they can simply remove the external hearing aid and magnetic contact or switch the processor off. Once the hearing aid/magnetic contact is off, there is nothing to see that would let you know the implant was there (this came as a surprise to me!). Having the implant inserted is a complex and long operation carrying the risk of partial facial paralysis if the facial nerve is damaged. I don't think having it taken out is an option.
The insertion of the implant destroys any residual hearing in that ear - which is why they only implant one ear. If any new therapy came along, there would be one undamaged cochlea.
"the insistance that their child must wear something even though it makes them look different"
If the child does not have a hearing aid of some sort, then they are not going to be able to socialise effectively with hearing children. An ordinary hearing aid is just as visible and open to ridicule as an implant one.
One of DS1s friends was left profoundly deaf after meningitis at age 2. She had the implant inserted at 3.5 and 6 months down the line is making excellent progress with her spoken language - the difference is lovely to see. She can still sign and lip read so she is well equipped to deal with both the hearing and deaf communities and can make the choice herself later whether she wishes to use the implant or not. She will now be able to attend a mainstream primary school without too much special assistance.
DS1 (and 2) learnt some signs when she was learning to sign (hello, goodbye, biscuit please etc) and I have gained some insight into the difficult choices this child's parents have had to make as well as learning more about the deafness and a few signs.
HTH!