I agree that it probably can't all be done, or it may never get released, - so there has to be some compromise. - Where that line is drawn is obviously up to Jim. - But in my opinion, it would be wrong on a number of levels, to send it to market, "as is".
I don't think it is a matter of it taking another month, three months, or a year. - It's what effect marketing an unfinished product may have.
I unfortunately have to agree with cjmaddy's assertions- I've used Marine Aquarium since 2.0 first came out, and although 3.0 is better than most of what's out there, in it's current form it doesn't really stack up as a major new release. This is in no way a slight on Jim, (or anyone else who is contributing, for that matter). I can't begin to imagine the amount of work he's put into creating this software, and I certainly do appreciate every last bit of it :-). But, the question was asked, and I don't think Jim would really benefit if everyone just said "It's great! Release as is!"