In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Hydronic radiant floor - floor doesn't feel warm...
Putting aside the technical questions of what was done and how, I would like to address the larger picture of expectations and specifically the conflict within them.
Firstly, your spouse has the expectation that the floors should feel warm. Her view is one of a perceptable floor temperature.
Secondly, the general purpose of a radiant floor is to heat the house (which it seems to be doing, almost too well).
Given that, the floor temperature becomes almost incidental.
These two expectations are in conflict.
From the sounds of things, the system is doing what it is supposed to do but perhaps the reverse of what you intended (that the floor be supplemental and the furnace would do the base heating). It is the other way around and that is not a bad thing either!
A floor at 85F or approaching that is usually enough to heat most spaces. A bathroom might tolerate a warmer temperature but that is an exception. Warmer than that, physiologically, a person might feel too warm.
The body cannot radiate heat to a surface warmer than itself, and your skin temperature can easily be in the mid-80's, sometimes higher such as when you just pull off a sweater and sometimes cooler such as your hands or feet might be.
Yes you might be able to get the floor to 85 but your energy costs go to waste and the spaces would over-heat. Cannot have it both ways. I do not see the system as needing fixing. But I would set up the controls to make best use of the floor as the primary and set the force hot air as a back-up by putting that on a lower setpoint. When the floor cannot keep up, the FAH kicks in. It may never happen you know.