Thank you all for your feedback.
All very helpful and reassuring, especially the comment on ‘review time’ where CF bolstered allowances to counteract increase in income, when they could just as easily have increased the IVA repayments. Sounds like the transfer may not be as bad as I first thought.
Actually, I received a surprisingly pleasant courtesy call on Saturday from one of CF's reps. I made my concerns known over the requested fee increases, and the rep. reassured me that I would not be pressured/forced into accepting this change. I'll wait and see of course (should be getting the actual paperwork in the next day or two), but it sounds promising.
My old company's customer service was next to nothing, so if CF's is even slightly better, that's fine. Actually, I was quite pleased to note that Mon-Thur. CF's phone lines are open until 8pm, whereas my old firm was strictly Mon-Fri, 9-5.
I got the impression that CF have brought all of my old company's 4,500 IVA cases, and that CF merely wanted to keep them ticking along nicely, keeping both the customer and creditors happy.
To me that suggests CF want to intervene as little as possible, let the IVA complete, not ruffle any feathers on either side and make a little bit of profit in the process - fair enough.
This figures: After all, any customer (or creditor) causing hassle is presumably going to take up time and therefore money. Indeed, I've read a few other 'Credit Fix' posts on this forum, and get the impression that in many of those cases, when challenged over proposed new terms etc, CF seem to back down, rather than risk a dispute.
In summary, I will write to CF advising that I will decline their request for the additional realisation percentage, and go from there.
My opinions are just that: Based on my experience and being a self-employed IVA customer.