Penny criticizes the effects of the new discovery scanner in wspace. Right on. I put some suggestions there in a comment, but recently read another good suggestion (by Sugar Kyle): have automatic discovery happen only in highsec. The explanation is that it is an service provided by empires. The effect is what we want: to alert newbs to the world of exploration, while keeping more dangerous spaces mysterious.
Here's a few other changes I'd like to see made related to probing and sites.
Remove the Z-axis arrow in scanning. Already covered.
Put back ore signature sites, and add ice ones. This does not mean eliminating the current anomaly-based mining sites. (It might mean making them a bit rarer.) Variety is good. As it is, making all mining sites be anoms makes it too easy. Anyone can see anoms, which makes them little different from fixed asteroid sites. This is true both for the miner and the ganker. Sig sites change the balance somewhat to favor better-prepared miners. Not only do they have less competition from other miners, they also have a level of warning (seeing scan probes) from gankers that is not available in asteroid fields or anoms.
Add in some deadspace-based mining sigs. (That is, they have a warp gate like a mission site.) These should have enough tough rats to require at least a modest combat ship to kill, like a level 3 mission. Thus, to exploit them you'd need both scanning and PVE combat capability, in addition to the ability to mine. Mining in deadspace would be safer than mining in sig-sites, because gankers must reveal themselves at the warp gate for at least a few seconds. Also you can jetcan the entrance to make cloaked entry hard.