... isn't ABW a printer driver managed setting?
You're right of course - I had actually reached that conclusion myself, though I've not seen it stated anywhere
As far as your other problems, normally when a paper is unavailable it is because you have chosen a paper path which isn't compatible with the paper type, perhaps the new driver is trying to enforce that more aggressively? Many fine art papers are not supposed to be fed through the normal top slot, but require the rear manual feed or the front manual feed slot. Any chance that's your problem?
Again you're quite right here, Wayne - I just tried out your suggestion and got all the paper types available using the rear paper feed in page Setup. So yes, we're looking at an increased enforcement in the driver, which can only be good - though documented somewhere would be even better!
As far as workflow, I believe "default" is the same as standard, and yes it's unfortunate that the new drivers will probably wipe out LR presets since those profiles are deleted and replaced with new profiles and the LR presets also remember which printer preset you use which are also lost. I've had the same issue. After I correct the problem when using a preset I can right click on it and update it to current settings, so I haven't had to make them all from scratch. Many of the preset settings are still valid.
I know about the right click to update settings - one of the most useful - if also one of the most slippery - aspects of the LR print module. I think the reason I needed to rebuild all my templates may be to do with some of the (with hindsight unnecessary) driver deletions etc I went through earlier in the process.
I think I'm there now, with help from all who've fed me ideas and suggestions in this thread. I'm not by natural inclination an early adopter, and this time bitten will be the more shy when 10.8 comes along!!
So once again
Thanks to you all - what a great forum this is, in times of need or confusion. Lightroom can be a solitary workspace at times, and that way leads to despair and madness without the help of those who are willing to share their knowledge and expertise from afar!!!