Are there any specific advantages or dis-advantages to the use of Nickel-plated cases considering our possible use of them? 

For breech-seating, I wouldn't be concerned.
Fixed is another matter... have seen a few straight wall new factory loaded rounds using nickel cases pull in half between the base and the case cannelure.
Have also seen a few new unfired nickel cases fresh out of the box that had a portion of the nickel plating from the inside of the case necks flake away during the first sizing (not re-sizing), leaving ragged surfaces for the lead bullets to bear against. Don't think that's good for uniform neck tension.

I used to make 356 Winchester cases out of nickel plated 357 case with good results.  I lost only a few due to splits of plating peeling.

My 2 cents

I used to shoot A LOT of pistol ammo and have had the nickle cases scratched my sizing dies.  Also if you ever need to trim them, they are HARD.

So not I stay away from them.

   I found a bag of new 45-70 N/P cases in some of my stuff.  I am starting another new "durren-project" using a shortened (1.80"oal.) 45-70 case to make a Michigan-legal "pistol-cartridge" Ruger SS #1 rifle for deer hunting. 
    In principle, its just setting the barrel back and cutting a new chamber to accommodate the slightly different taper shortening the case will create, having him tweak the trigger, and modify the sight rib to fit the set-back barrel.
    I also have a whole bunch of standard 45-70 brass. So I thought I might make up a few of each and then, when the rifle is done, give it a try in a "class 3" match or two just to see how it works at the longer range (it'll obviously be a hunting rifle rather than a "match rifle" I'm sure) and at the same time do a side by side test of the cases, out of my compulsive curiosity .

Something you might mull over is how many nickeled military cases have you seen over the years, and why not.

DW the 32-40 Nickel cases have been my favorite cases used for breech seating and I have never had an issue with them not blowing out to fit the chamber, cracking or being found hard to trim. It also intrests
me about all the talk of the need of annealing cases. In regards to breech seating in the past sixteen years of competitive shooting I never had the need to do so. I have done so in the past strickly out of curiosity and I found I should have just left well enough alone and have not done it since. I found it to shorten case life and not improve it and what few cases I have lost over the years were those I annealed and they collapsed at the mouth of the case and the process used was indeed done correctly should one wonder if that might have been the cause of which it was not.

JLouis

Back in the 1950s when cops carried revolvers they had leather cartridge carriers on their duty belt. Nickle plated cases didn't turn green in the leather loops that held the rounds. 

I have used both platted and not plated brass over the years and the biggest advantage of the platted has always been the corrosion resistance. I can find no down side to the use of platted.

                              Sendaro