About the Army's involvement well this is Pakistan and it remains country that is run through the Constitution of 1973, which is why the Army must obey its civilian master constitutionally, but what you are asking for is confrontation from the army on the impeachment decision, that would erupt Marshall Law Blain, and than Pakistan will be in new game it might be bloody game. If you are patriot than you should avoid the though that the Army will save Musharraf, why that would not save Musharraf instead it will endanger whole of Pakistan.
If a nation is in danger, then being unfair and unjust while trying to fix it won't do. Musharraf has given his best to Pakistan (even though he failed at quite a few things). He fought for Pakistan, he served the country and when he became President (I am not debating how etc.), he did his best and his best yielded better results on more fronts than what any of his predecessors (aside from Ayub) can claim.
What I am absolutely against is even the possibility of somebody dragging him through the courts for their own personal edification (NS). He deserves much better than this. Also the injustice of all this is that our bloody nation is not worthy of judging one over the other. While he is to be put on trial, what about the millions stolen from Pakistan by that Mr. 10% and NS? The mansion at Raiwind is all from ill-gotten money. What kind of justice are we trying to get at? Ours is a nation of hypocrites. There is no other way to describe us. We use Islam to hide our hypocrisy to get to our goals. We love party politics more than we love Pakistan (and let me remind you that this is a jab at PPP and PML-N). I do not say this because I have some sort of personal hatred for these two parties, its just that their leadership stinks and is petty and does NOT care about Pakistan (Hussain Haqqani's recent outburst about the President of Pakistan and that too to outsiders in the US is something to think about, where are we as a nation going? Where is our national pride? Where is our self respect?)
Admittedly I am not a supporter of PPP but I will admit that I was personally filled with pride the day Benazir Bhutto took office for the time. I was inspired by her leadership but was disappointed later but not to the point that I gave up on her. Her 2nd stint, I was again hopeful and then let down again. NS was a dismal disappointment every time in the office. Then came along Musharraf, who blundered and made mistakes but was also able to do some things right. So if we are judging, by what standard are we judging?
Lastly, I would agree with you that Musharraf is but a person, but his legacy is not about just the blunders (which others have made more of), rather it is the hope that he brought to the nation. He did his best, admitted his mistakes (which nobody in Pakistan ever does or ever did), maybe he overstayed his stay but even then he does not deserve what these petty thieves (NS, AZ) are cooking up for him. Pakistan's future is in the hands of these two looters who are convicted criminals (that they deny these charges as politically motivated does not cut it because we know the truth is different). Having this much knowledge about the character of these two folks yet persisting on their leadership is a suicide which we as a nation have decided to commit. So I wish you good luck with this. Too bad that I have to watch the country go through this fiasco.