Philosophical issues aside...
Regarding restrictive rules, they really force teams to be more creative, but back in the days it was very bad for international teams. The "Small Parts" rules were a nightmare to us. I do believe that, if such rules were considered again, special attention should be taken.
Having to use an 8 pound sprocket shipped from 6000 miles away is insane, and the costs associated with that rule - shipping (and FAST, build season is almost over!), customs (87.2% of the total value!) - could very well mean one less student is able to make it into the USA.
As for creativity and, in your words, "creating solutions from a kit part that was never intended to do the job for which it would now be used", it can also be accomplished without said rules. This year our team used a car jack to tilt our 4m long arm. You can't say that this isn't creativity at its best (and no, it wasn't my idea
), and the jack sure was never intended for that use.
My ideas might be a bit confuse, but there's some food for thought.
PS1 - There are other ways to force teams to be creative. For instance, when your 1/4" tubing bag has a big 20 feet written on it, and you do your figures and... NO WAY we can cover the entire robot with that length. So you proceed to install a solenoid valve on the very tip of you 4m arm, only to wire everything up and find out that the bag was really wrong, and you actually had 20 METERS of tubing to work with. Just leave the manual full of those small typos and teams will be creative, I assure you.
PS2 - Can we have pop rivets as unrestricted on the Addition Hardware List? 