Universally Pronounceable Phonology

I don't typically go in for auxlangs, but I've started helping out with a 
small group project, and I'm trying to design a phonological system that's

as close to universally pronounceable as possible.

I've started out by eliminating any consonant distinctions based on
voicing 
or aspiration, and putting together a lot of allophones. After taking out 
some other possible noises that are missing from any of the various 
languages I have appropriate knowledge of, I've got a list of 7 1/2 
consonants:
b- labial plosive
d- alveolarplosive
g- glottal plosive
 j- postalveolar fricative
v- labiodental fricative
z- alveolar fricative
n- nasal
r- any of r, r\, r`, r\`, l, l`, or l\ (counted half at the moment because

r's and l's can be syllabic)

How does that look so far? Would it be a really good idea to make 'r'
firmly 
consonantal, or is it OK to let it be syllabic? Anything that I should
take 
away or add?

Coming soon, vowels and syllable structure....

-l.
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