Hans von Bavaria has been silent, but now feels that he should put forth his opinion on 4.3:
With all due respect to the Kaiser, I believe 4.3 will bring chaos to the Reich. It can just as easily be a route for, say, power hungry electors and vengeful Emperors to depose a noble Duke. The bad effects outweigh the good.
I also disagree with Herr Matthias's assessment of 4.4. We will be dead and our sons will be dead, and many of their sons will be old men by the time we need to take the last Byzantine city. There is plenty of time.