Haven't been to Rec Hall in about 20 years, so can't say much about the atmosphere with today's coaches/team.
I do know a few things about Carver, though:
The atmosphere is so unique that it has it's own saying- Carvered. Don't think anywhere else in the college wrestling world has that. Although, have to point out that if you did get your own, getting Reck'd(spelling?) would be a pretty badass one.
There's not many venues in college wrestling that can come close to matching the energy of a highly anticipated dual/match in Carver. Not trying to take a jab, but I will point to the crowd reaction to Kemerer beating Hall as a prime example of what Carver offers that other college venues do not. Nearly 15,000 fans collectively losing their voices is something that just doesn't happens at college dual meets pretty much anywhere else. Truly wish every college wrestler could experience that type of reaction to a win at least once during their career.
On the flip side, opponents coming in and silencing the crowd with a win of their own appears to bring great joy as well. Have seen numerous wrestlers celebrate just a bit more after a win in Carver(think Bo's hand to ear) than they do any other time. Not upset with it at all, it's part of the Carver experience. Have heard numerous interviews where wrestlers cite Carver as their favorite place to wrestle outside their own facilities.
@Psubiomed brought up modern history(PSU is 6-5 vs Iowa in duals under Cael btw). Part of what makes a venue so special IS all of the things that have taken place under the rafters. All of the previous duals, past wrestling greats, epic matches, etc. It's all part of what makes Carver special. Discounting them because it's in the past is silly when talking about a venue.
TL;DR version - Carver is awesome and everyone should go at least once!