you focus too much on speed it is a 1b not ss, rarely are they speed burners, most are very slow. so at 1b, a guy being slow is not a shocking development in my opinion or a negative. he is about and average fielder, but it is 1b we are talking about here, you want them for there bats, unless they are butchers, which duda is not.
duda has almost a 900 ops, and has been playing, he will hit for you, now nobody is saying he should cost a team there best prospect, but a top 5-10 prospect on their team is quite reasonable.
Bruce should get a top 5 prospect from a team in my opinion, if not top 3, he is having a fantastic season, I think the fact that he was owed this year was a detriment, plus people are slaves to war, hence why heyward got so much money, bruce defensive war last year was outrageous bad, I don't know how he played last year, but my eyes tell me he is a average rf, so that is not a detriment. I think he will be in more demand this year to be honest.
I think the two that will get good prospects as well are blevins and reed, with how people want bullpens, I think they both will bring back decent pieces in my opinion.