If they were really interested in making better, cheaper plans, they would roll back most of the ACA, eliminate the restrictions on buying across state lines (actually allow competition), and transfer the tax incentives for getting insurance from employers to employees.
Basically, all they had to do to make healthcare more affordable was to open up the Federal employees plan to everyone and transfer the tax incentives to employees. This was actually proposed by both major parties prior. It would have been about a 10 page bill.