of course, but I am speaking from a viewer standpoint.
The casual viewer will remember chakotay and seven, if they are expected to remember maddox etc, then surely chakotay would be a cert to be remembered.
you would expect some mention of him.
The idea that picard would have no objections to being an android also goes against the character we have come to know in my opinion.
First and foremost, casual viewers aren't expected to know Maddox, Hugh or Icheb. The use of older characters is two fold. One using established characters that are appropriate for a new story help build a foundation that this universe is fully realized. The 2nd and much more minor reason for there use is for it to provide a deeper connection to diehard fans.
For example, using a doctor that Picard has a history with could easily be Crusher. It doesn't need to be. But it makes sense that the doctor Picard sees is someone he trusts. Crusher of course would be one, but it could be any of number of doctors he has had a prior and trusting relationship with. Using one that we have never seen or heard of before but tying it to the Stargazer gives us the diehard fans a connection to an earlier part of Picard's life. But you notice they don't describe what the Stargazer is, it's not needed, and the causal fan or the person who has never seen anything before isn't going to need to. The scene gives you what you need to follow. This is a doctor that Picard has a past with and its someone who knows something of Picard's earlier life.
Icheb use is perfect and so was his brutal death. It's shown in this story that this was a deeply personal connection, tied to the greater Borg issues that is a part of the connecting backstory of that season. And it's brutality helps show why Seven is the way she is. It works for diehard viewers, it works for casual viewers and it works for new viewers.
Hugh is a rather great fit with this story, as he is a character from he past that has motivations for the role he serves, he also has ties to Picard and die hard fans might connect it. But the story is told that even if you have never seen the show you can see there is a relationship to both Picard, the Borg, and finding individuality.
Bringing up, a past relationship is only relevant if it has any bearing on who Seven or her life at the moment. It literally serves no purpose in legitimate storytelling.
On if Picard would object to being copied? Thats not so cut and dry. There is one terrible second season episode where we discover how the crew feels about having clones of themselves made without consent. But we also know that he has no issue with having artificial parts to prolong his life, also from a second season episode. We do know that he has no issue with his body and mind being destroyed and recreated, on a rather frequent basis, unlike say McCoy who has never been very comfortable with it. We know he has no issue with the idea of this being legitimate life. The only real issue is if Picard would be upset that he wasn't allowed to die. At the end he did seem worried about having an longer then typical life for a human. Thats the one issue he did bring up. And the idea of an android body mimic the true life functionality (including death) of a human is part and parcel of TNG, so that's definitely not something new.
Now of course because so much of a character is still not defined, an audience member is free of course to have their own subjective feelings about character traits and beliefs that haven't been clarified previously.
My personal interpretation is as long as he still felt all the sensations that a human would feel (good and bad), that his functionality was the same as his natural form, and that he was still mortal, I think Picard would be ok with it. I do thing he would still have a while to fully come to term with it. Just like I assume that it took Picard much more than what we saw on TNG to process and come to terms with what happened to him as Locutus. And really outside of Family and I, Borg the tv show really didn't give it much attention (First Contact brought it back up as well as several episodes in this series which make sense as both of these examples would bring them to the forefront of your consciousness),