Bad idea. Relying on any single technology creates a nasty single point of failure. GPS signals are weak signals from satellites & obviously can be jammed.
The VOR MON is structured to provide a usable (for safety purposes) backstop should GPS fail, so from a safety perspective this isn’t making us more reliant.
> 10 years from now, the network of VORs will be about 68% the size it currently is.
So they're cutting about one-third of the VORs by the end of the phase out.