With 38 games per team, and to also have playoffs means starting the season Feb 1, or maybe the week after the Super Bowl, and ending in Dec. It is possible, but is it practical?
So if they stay at 34 games to keep the playoffs, then the regular season would not be balanced and some pairings will have to skip a year, or some teams in the same division will only meet once. IOW, leave things as they are, just add more teams.
Another alternative they might consider, is a tiered league equivalent to an internal pro-rel.
Bottom line, with 30 or 32 teams, what a mess!