More discussion on this issue is clarifying how important it is for the EK group. I wish you well as I think EK has a bright future and there is a lot of experience in its right seats. I am wondering what sort of seniority list you have and if captains and FOs are on the same list. I am also curious about the sort of representation you have with management.
Could you in a non-confrontational way offer some solutions such as expediting upgrade by lowering the 3 year requirement(perhaps an arbitrary number), or hiring DECs on contract after which they can remain in the position permitted by their DOH, and perhaps even some sort of compensation for the bypassed guys? If it doesn't cost too much extra money or time, they might take it. Everyone knows that it's better for employee morale to promote from within.
Indeed the impression that EK gave was that they were hiring only captains to be. You, somehow cordially, have to remind them of that and the importance of command for your careers and the value of happy pilots/employees. I certainly hope that you are meeting amongst yourselves and with the company to meet the challenge. However, if you should get these DECs, contrary to some unsympathetic remarks above, they will likely be seasoned folks and come in with high regard and respect for the by-passed group.
Good luck folks