Sadly I find some of their historic reissues not as good as earlier releases. I am speaking specifically of the "DG Originals"; the ones where the CD looks like a mini-LP. I bought a couple and came to the quick conclusion on concertos that they boosted the violins and the soloist on the remix. They really stick out. This sounds good in the car where noise drowns out the detail anyway; or on a portable or boombox that has no detail. The bass detail is also missing as mentioned by others. I have found a few of the older or original CD releases of these recordings on eBay, and there is more bass in the old CDs, so they actually made it worse (amazing).
In the CD of the Dvorak Cello Concerto with Rostropovich/Von Karajan, the old CD has all the nuances in Rostropovich's playing which is more in the lower cellos notes., Also some of the inner detail in the orchestra is apparent. In the new "DG Originals" the main theme played by Rostropovich and the violins is a lot clearer and pronounced, however, all the background detail and nuances in the lower notes is gone.
What I will say positively about the DG Originals project, is they did release some new (old) material never on CD before that is worth owning for the performances. (I do have some of the real orginals on LP.)