Jack
We can look at reducing the designs people start with, the impacts of research or other factors if you're maxed out by race 9. Open to suggestions (in the suggestions forum). :)
The cap of 100 isn't flexible at the moment for technical reasons. It may be something we revisit also if it's a popular idea.
Lowering the start designs would help as it would prolong the supplier effects a bit plus it would have a bonus of it being 'slightly' easier to change to a new league as peoples 1% car wouldn't be quite as far away.
its pretty easy to get the main ones to 100 by round 9 and an extra one to 100 for race 10 (ffor a level 18+ team anyway,dont know about lower level teams), the other attributes dont seem to make much difference.