"I have no idea why anyone would want a Mud X for year round riding"
If you stick new ones on in October/November, then they'll gradually become lower profile over the course of the next year ..
With a 62a centre profile (55a sides) and part worn tread they're not that bad in summer, they're can be quite good in some of the more iffy 'summer' conditions we've had the past few years
All rounder? Maybe a Bontrager ACX, available in harder compounds or the same 55/62a, oh wait, they just ditched them with no direct* replacement ..
*the XR4 is ~200g heavier for the 2.2" tubeless and not available in 'GumBi' dual compound 55/62a