Nice post Tritium!
Yeah, I think that Production will be just fine. It has taken off and not looking back. Some rules are a little questionable, but all in all, I think that they are mostly good choices.
For those that haven't been around IPSC very long, they may not understand the essential quality of "stifling" the rules for Production. When IPSC was very young, it was basically a "free-for-all" between competitors. Then, the divisions were born. And so ensued the tweaking of guns and rules to try to beat the next guy. If you allow modifications to a Production gun, you will open a very large can of worms. I used to hate the Production rules, but now I relish in the fact that they are very simple. Most of the problems lay within reinforcement of the existing rules. Quebec Provincials was one that was blatantly trying to turn a blind eye to the fine details in Production. Say no more.
There is also a political side to the Production Division. IPSC and USPSA have chosen to use two slightly different rules to control a Production gun. The most notable differences are: Specific gun model difference, Holster (no race rig in USPSA), and the trigger. There are guns that are allowed in USPSA Production that we can't use in IPSC such as the Glock 34 and 35 because of barrel length and trigger pull. USPSA has no minimum trigger pull for Production division. That opens a whole new world to tuning a Production trigger for a very light action. In the same breath, they won't let you use a Race holster such as a Ghost holster or CR Speed in Production. Seems a little silly to have a "tuned" trigger and a Kydex holster to me. I think IPSC rules are better overall to the intent of the Division.
I have shot quite a few different Production guns now, and I can't see a real difference for most people no matter what gun they pick. As long as they use the gun that feels good to them, and it works, then it is fine. I shoot a Glock in 40 cal for Production. Why? Because I had one. Is it the best gun? All my friends say no. Can it win matches? You bet your ass it can. If you don't believe me, then ask Dave Sevigney. My point is that any top shooter will tell you that 80-90% depends on the shooter. The rest is good reliable equipment.
So, does it matter if Sig or HK brings out a new gun just for Produciton division (and believe me, they do)? If you are a Master or Grand Master, maybe. Just maybe. I have shot them, and I don't think it is a great difference. Just my .02