Development Level Cap Option

In my league now, in the Elite tier, we have decided to trial an effort to cap our cars for the next season (ok, the season after next as we have 2 races left in the current one as i type) to 80% for the beginning of the season. We're going to organise ourselves so that we all spy on someone different and report back anyone 'breaking' the rule (though at only 1 part, it's possible a 'cheat' will easily be missed if we guess the wrong part to look at).

Now I know that Jack and Andrew can alter a design's % backwards, Jack I believe did this for someone in my league who joined late in one season with a good car, and had a really good car for the following season (something like 90% current and 90% next), and that just didn't make sense that he'd be able to have such a scenario happen, so off his own initiative he asked for the following season's car to be scaled back a touch.

What I want to ask is, is it at all possible to add an option to leagues so that we could set this ourselves? Then anyone that has a car above the season beginning threshold would have their design scaled back?

We're doing this in an effort to a) stop the 100% one season, garbage following season, back to 100% the next yoyo-ing, and b) to try and close things up and make it more consistently competetive at the front.

The idea is that we'd all start with 80% cars for the first race, then we are once again free to go as nuts as we like on development from there.

So after that wall of text, my question once again is, would it be possible to have this as a feature we could set in our league management options? (we only want this rule for elite tier, Rookie and Pro can still go about business in any way they want)

Would this not stop the competition, there is always someone in every league in most games that is better than everyone else. It gives people something to aim for.

For the league we are in we think its good option that we are going to test out as it seems every1 is in agreement as we are all so close it will be big battle every race rather than waiting for the last part of season when we have all the same car.

In our league we start all around the 60% some more ore less. It's up to every one to develop on there own speed. The last 4 season there were all close races. We are also talk a lot in 2D and by Team Speak.
Have a 100% car at the beginning off the season just destroy the next. Don’t really think there is the need for level it. It will only be use full when a new driver joins the league.  

(Sorry about my english, no mother language, doing my best).
My full support to Matt Dellit initial post.
He's just asking to have an option to cap it inside every league, Kay, not to implement it forcefully in all of them.
In my personal opinion, this is really a must in strong competitive leagues where ( no 100% car = no option to win championship), and we've had this in last seasons in Formula GP.
You may first think it's nice to have 100%, but when you go throw season after season, you realize that 100% cars only kill game experience, competitiveness and fun in the long term.
We'd love to be all of us competing every year, not the half of us competing every two years and then a full year off.