Great library for the money. Lots of sounds and gets you going easily as I suspected it would. These are suggestions that I think would help round off the library for GPO Ext.
Brass: Needs more bite. The Horns need more than one ff patch plus a good pp-ff mod wheel control program (maybe thats all it needs is one patch like that). The trumpets and bones could use this too. A stac trumpet and trombone (shorter than what can be achieved currently) would be great.
In the short run adding the SAM brass collection makes for a killer combo.
Strings: Non vib patch? Also how about a sus-trem MW crossfade patch. (Easily made in Kontakt). As far as the Double Basses are concerned the first thing I did was send them to outputs 3-4 and add an EQ to tweak. Perhaps a pre-tweaked version would help in giving a nice fat bottom to the sound.
With Space Designer's 1.6s Grand hall and a little adjustment to the panning I was able to get really close to the sound of another library in the far mic position (not every sound of course).
Well done Gary! Shall I make the afore mentioned sus-trem MW patch for you?