I can't say I have much trouble with Steve's voice itself, I liked what he did during the bridge event and it was nice to see him getting a little more involved.
Which, I suppose, is my actual concern here. His stats list him as being kind, willing to help others and do good deeds, who would get along with just about anyone, who struggles with adjusting to his new life and with expressing his own feelings to others. Yet I can hardly say I've seen this reflected in his threads.
Correct me if I'm missing out on things, which is possible as it's easy to miss threads sometimes, but he seems to not really have made many connections so far. Even his threads with Bucky, who I would've expected would be a huge part of his CR, are usually short or even dropped fast at times (such as Bucky's canon update). He doesn't seem to know much of Bucky's large number of CR, or many of the game's known and popular characters. A sociable, well-known character like Stiles mentioned he's never spoken to Steve directly.
Even the notes on him on the plotting post right now seem very empty - you want him to get a job, but don't have any ideas yourself nor offer any insight as to what he could do - and overall it feels as though Steve has little sense of direction, and it's difficult to get an idea of what you'd like for him to do, in terms of his personal issues, his relationships, or what he could do for others.
Getting more insight on this would be great, as well as detailing out where you'd like threads/CR to go with him. As I said initially, I really liked the effort made for him throughout the bridge event, and would love that sort of initiative reflected in the usual Steve as well.