Ok. Just say "No" to dice. I play a lot of WAB and enjoy it while recognising its significant defects. Part of the reason I started Nappies was to get away from a WABlike system.
I also dont hold with dice being the major factor in deciding casualties. Take artillery for example. Most gunners of the period were fairly professional, they knew their business. Say a gun or battery is firing at an infantry unit. Turn 1, good die roll, 6 casualties or whatever. Turn two, poor die roll, 1 casualty. Why? I appreciate that there has to be a little luck, but if you get your troops at the right range, in the right formation, the damage you inflict should, IMHO be fairly standard, not wildly different depending on your dice roll. Dice rolling should be just one factor in causing casualties, and not the main one.
What is more important is command and control - I like the idea of units not doing what you want them to when you want them to, but not so that, for instance, anyone who likes Prussian 1809 uniforms is doomed never to win a game cos his brigades all go off in different directions! But I think that games should be won or lost on whether your plan is likely to be achieved by the units you use, not whether your opponent rolls snake eyes on the casualty chart. "Where is Grouchy?" is more the thing!
As to simultaneous moves, I am cautious about gamesmanship, but wouldnt let that stop a good system. My solution to that is you play the bounder once and thats it. I would like to see a system where the quality of the commander or the quality of the troops had a bearing. After all, a good commander may get his Landwher moving quicker than a mediocre one got his guards of ftheir packs.....Take those poor Prussians again - there was nothing wrong with the fighting quality of the units, just the High Command were a bunch of duffers. Give them some better commanders and see what they can do on the table! So, its a mix of simultaneous and IGO-UGO, with Excellent commanders activating units, then Guard, then Veteran, then Good Commanders etc etc.
Im also a fan of Card based moves, but thats a whole other dynamic and luck is more of a factor (unless "better" units had more activation cards etc...) which gives a different (but still fun) game.
Anyway, my deux centimes worth.
Vex me Not, or I will have you dragged awhile....