Upgrade , limitations that should be addressed

I rarely prepare 1040-NRs so your last point caught my attention.  Are you saying you can't prepare most states from within the 1040-NR?

While I'm here, I'll make few comments on your other points:

1) Maybe it has improved, but based on when Advisory came out, it seemed like a waste of time and money.  It seemed to only have very basic information.

2) Yes, I agree a word-search within a page would be nice, but I doubt if it will ever happen.  It is possible the type of programming for the page may not even be particularly compatible with a word-search.

3) Within ProSeries, isn't clicking a check-box the only difference between amending and superseding return??  Or am I missing something?

4) Each year you have more than 100 new clients from other states?  Wow.  Are a large portion of those Nonresident or Dual Status Aliens?

4b) ProSeries is NOT particularly good with foreign-related things, so if you have a lot of Nonresident Alien clients, you may consider trying out different software.

As a side note, unfortunately making suggestions here is pretty much useless.  I don't think the developers even look at the suggestions.  A few years ago a nice developer came to this forum asking for what improvements we would like, and he didn't even know that the suggestion pages even existed.  The management doesn't give a crap about ProSeries.

I rarely prepare 1040-NRs so your last point caught my attention.  Are you saying you can't prepare most states from within the 1040-NR?  Yes @TaxGuyBill 

On Form 1040-NR, you can only file return for states that do not have an income tax, California and New York. For other states tax returns alongside a 1040-NR is not supported in ProSeries. Additionally, Form 9465 is not covered in ProSeries for 1040-NR filings. For 1040-NR filings in California there are many F-1 visa holders and other nonresident student taxpayers.