I can comment only briefly, as I'm not familiar with the concern letter specifically, although I do know that letters of concern are normal. They don't necessarily indicate a high degree of risk versus a low degree of risk. This process isn't necessarily enough to really understand what is being highlighted for what needs addressing.
Of course, we all, as pilots, want aircraft to be.... If there are any outstanding issues, we absolutely stand for them to be addressed properly by the manufacturer and the regulator. That's absolutely something we would support.