I disagree if for no other reason than to a point a finger at two 'worse' offenders -- TOS and Enterprise. Neither series intended for its cast to feel like a total ensemble though so they're technically off the hook, but put side-to-side I thought Voyager did a fine job.
Much as I like Enterprise that's what's missing for me -- its non-leading cast is less-developed than Harry Kim. Point is, that's saying something.
Does this excuse Voyager from the problem? No, of course not. But the thing is there are many worse offenders out there. Not every show can be DS9-esque about it.