M.R.
Hi M.,
I would suggest that you call a speech pathologist and/or an occupational therapist and get an oral motor evaluation as soon as possible. This is important for all the reasons you list, but also for the proper development of speech because the tounge and lips gain strength from chewing and moving food, and without the proper muscle tone, he may not be able to make all the sounds he will need. The earlier you intervene, the better his outcome will be.
M.