It would be 3500 CHF. On the higher end of what they told me it could be when I met them
That's crazy, probably the highest quote I have ever heard for a service. I don't think you will gain anything working with the (new) UG, just find a reputable independant watchmaker who is good with vintage.
In my opinion, a redial or a damaged original dial has no historical value. As for the market value, it depends on the mercader involved in the sale of these great universal geneve watches.