Hi,
I think it is up to Japanese people to decide if they want to keep Kanjis or not. A language is not geared towards the expats living in the country, but towards the native speaker.
We in French have very complex grammar that is a hell for foreign students, and probably as complex to learn as kanjis. I cannot make my mind about if I wished it to be removed or not. I believe that anyways, I would continue using the full grammar because I find it more stylish.
I believe most Japanese want to keep the Kanjis, as it is part of Japanese culture, and also Japanese language needs them (too many different words with same pronunciation else).
What will change is that mostly japanese people will not be able to write them anymore, just to read and type them on the computer. I believe it is already the case with young people, not just with exotic kanjis (a friend of mine was unable to write 窶愿?.