the next films will not have the benefit of being able to dwell on the O5 for very long. They also have to resist the temptation to fast-track Wolverine onto the team, especially with his accepted backstory of being technically 80+ years old (with slowed aging), etc.

My suggestion is that the "next" Logan be "legitimately" a younger guy- late 20s. No hazy memories of the early 1900s, or military service during WWI, WW2, Korea, Vietnam, etc.