Whole court case is a total waste of money and time. Yes it should go through parliament as all legislation should.
Will it make a difference? No of course not, all the parties have said they will vote yes so what's the point in challenging it.
Should the devolved parliament's be consulted? No, it's not a devolved matter, what's the point. How about they spend their time doing something constructive instead of wasting hundreds of thousands of pounds debating something they have no power to affect. That's why there are MPs in Westminster