Dave; Ian...I use an arranger, too, on about 30% of my jobs. You're right; the market has changed drastically, and group work is harder to come by. In certain instances, the arranger makes it possible to work.
I guess the secret for me is to use arrangers and other "helpers" (harmonizers, loupers, etc.) as tools that facilitate, not as crutches. It's kind of a slippery slope, and I personally draw the line when it comes to karaoke, or sequences of any kind.
And, of course, NO CHICKEN HATS!
Please understand that this is my preference only, and in NO WAY a criticism of people who do it differently. That's just not for me.
Here's to future success to all, regardless of how we choose to do it.
Russ