Of course, Tycolby and I like mining it for the Paragon ore elementals from the Gargoyle pickaxes.
I do all my garg pick mining in Ilshenar with a character that doesn't even have to stop swinging his pick if a non-paragon (and a most paragons other than copper & Valorite) ele spawns, and get about as much ore, thanks to the elementals, as I would have gotten in Fel using normal shovels/picks and a prospector's tool - without the risk of losing it all to a pk, and without having to compete with all the fel guard zone miners for turf.
But I've noticed a tendency for spots, when they do shift in Ilshenar, for all the ones that shift within a certain reset period, to ALL shift to the same material. For example, I had a stretch of wall near valor, that had most ore types in it, have most of the spots shift - and the stretch (from the Cyclopskin ALL the way to pass to the gate) turned to (before special tools) iron, Shadow iron, and BRONZE only (I can understand switches to the two of the 3 most common, but what caused the other 10 spots shift from whatever to only Bronze - and why no DC or copper spots?); a few days later, a few of the iron spots changed to DC, also simultaneously. Similarly, about a year ago, much to our delight, we had in one respawn, 10+ consecutive mining spots on one rock face SIMULTANEOUSLY change to Valorite, and stayed that way for a couple days.
Sometimes streaks are nice, sometimes not so. Either way, that kind of clumping/streakiness is not conducive to proper resource gathering...