I'll simply have to disagree. The LQCD calculation of gA, for example, provides the tightest constraint on new right-handed currents beyond the Standard Model. The issue, of course, is that without a calculation the "new physics" is already incorporated into gA.

> QCD would need revolutionary improvements to achieve such goals.

Make the computers 10x faster and the algorithms / libraries 10x faster and all the things you wish for are within reach. Much more plausible than _overthrowing the standard model with something that offers easier calculations_.