Nothing new I think... It goes back a few years: Aspect ratios (AR) of 3 maximum is allowed. Teams and manufacturers have omitted that clause all along; earlier this year the UCI said it would enforce it, but gave a period of grace to the many who were breaking the rules and would not have been able to race. And yes a change in AR does make a difference on the frame and handlebars in particular. Having done the calculations it does show on a TT bike.
