Good to hear that things have improved since you made changes and what a shame that an Ilford employee put out such poor information - soft proofing is such a boon to working accurately (and saving time, money and frustration) and the inclusion in LR later versions a great step forward
I played with it some more last night and I think the firmware update really did help. I also played with soft proofing in LR last night. I never really tried it seriously in LR before, partially because I've just never had a problem with any of my iPF6300 prints, and partially because the last time I looked at soft proofing seriously was a few years ago, before I started using Lightroom. Soft proofing raw in Lightroom seems like it will be better, and I like the way Lightroom allows making "proof copies".
Thanks to everyone who provided valuable feedback. You are all too kind.