Actually, the new software is strictly for backup in case the SHTF with the old stuff due to a host system upgrade or somesuch. I do not plan to transition to it in the foreseeable future. I have it active on another site I own so I can tinker with it and achieve some familiarity in case it is ever needed. It's a good project for rainy days if I just want to hang out in my shop.
I view the "old post" issue differently. I routinely delete anything over 60 days old. It's a once a month chore that takes less than five minutes. I see it as a current events forum, with the old stuff losing its flavor like chewing gum on the bedstead overnight. Once in a great while, I wish I could recover one of my own old posts, just so I could say, "I told you so!," but not often enough to change my practice. As we olde dirtbikers say, "Diff'rent strokes for diff'rent folks."
Aha, I just discovered something amusing about your post verification system. To the question, "Is Barack Obama a Marxist?," it will not accept the answer "Yes!" Doesn't like the exclamation point. I was gonna answer, "Hell Yes!," but I suspected that it wouldn't like that either.