What, if any, are practical uses for classic Jeep today in garrison?

Not just for garrison anymore....but equally suited for use around post.

The original Willys MB would be a better vehicle than the HMMWV in garrison. It is fairly obvious that the HMMWV was a "lowest bidder" vehicle. It is almost impossible to keep running, tons of blind spots, and just difficult to maintain. The MB was a lot more user friendly and more easily maintained by the operator. I could go on and on about this. It isn't really that the Jeep was better as much as it is the HMMWV is such a piece of trash. They almost got it right in the 80s with the "CUTVEE" but someone messed up. The HMMWV may have looked good on paper but execution was garbage. The Jeep was around for 50 years, the HWWMV is reaching the end of its effective life.

Depends. Check out those in the running for the UCLV;
http://defense-update.com/20150515_ulcv.html#.VXjCNLlRFEa

The Jeep Commando discussed at the end of the article uses a 2012 Wrangler Rubicon that has the European legal 2.8l CRD. Having worked with it, I would give them another chance.