I don't have answers to you specific questions but I will point out something about blasphemy.
Seems most problems with blasphemy stem from one thing, the realization that EVERYONE commits it. This realization then causes the poor teachings about it to mess with everyones head, I mean if your saved, but commit blasphemy, then your salvation is made null and void. But once saved always saved, God wills that all mankind be saved, you can lose your salvation, but you can get it back and it all swirls in a big black pit of nonsense.
If it is unforgivable and that unforgivness equals eternal damnation then we have a real problem, for you could be sorry that you comitted it, and you love and worship God, but then if it is unforgivable and that unforgivness equals eternal damnation then it doesn't matter what your theological position is, it throws a wrench in it all.
So, then from all sides of the equation we get teachings that are not likely the truth about it because everyone is simply finding loopholes by reading into the passage what is not there.
So if we realize the fact that everyone commits blasphemy, then what does that mean?
Well first we have to realize and believe once and for all that Jesus took care of all sin and that includes blasphemy of the holy spirit.
Secondly we have to realize and believe that other scriptures and the passage of blasphemy itself shows us the nature of blasphemy
And lastly we have to realize and believe that being unforgiven of a sin will not change your salvation, it affects your journey.
For instance, if you are headed to church in your sunday best but your running late and you exceed the speed limit, you are in danger of the penalty for that act.
If you get pulled over, your journey to church has taken a turn for the worst, you get a ticket and if you are not forgiven of that act, then you must pay the penalty, none of that prevented you from getting to church at some point, even if it next week or a month later.
That analogy may not be exact or precise, but it is only making the point that blasphemy is concerning what we are held accountable for, the passage itself says so.
Mt 12:32 And whosoever may be saying a word against the Son of Mankind, it will be pardoned him, yet whoever may be saying aught against the holy *spirit, it shall not be pardoned him, neither in this *eon nor in *that which is impending.
Mt 12:33 "Either make the tree ideal and its fruit ideal, or make the tree rotten and its fruit rotten, for by its fruit the tree is known.
Mt 12:34 "Progeny of vipers! How can you be speaking what is good, being wicked? For out of the superabundance of the heart the mouth is speaking.
Mt 12:35 The good humanman out of his *good treasure is extracting good things; and the wicked humanman out of his wicked treasure is extracting wicked things.
Mt 12:36 Now I am saying to you that, for every idle declaration which humanmen shall be speaking, they shall be rendering an account concerning it in the day of judging.
Mt 12:37 For outby your words shall you be justified, and by your words shall you be convicted."
The next problem is that traditional interpretations will have us connect a dot between Matthew 12:37 and the word "convicted" and have us believe that this means eternal damnation. But then that is where you have to remain in your trust that Jesus has taken care of all sin, in this case, taking care of the sin of blasphemy simply means that God has made provision for you to pay the fine.
I speak from my own experience, I have committed blasphemy, I can't go into detail. but it involved walking into a situation knowing full well the holy spirit told me to leave, I "suffered the consequenses" and I almost ruined my marriage. I was not "Forgiven" of that, I suffered loss. But fortunatly I am still saved because Jesus took care of ALL sin.