I agree with everything you say except for the CBJ comparison because the only common trait so far is they both inherited a depleted roster.
I would be more than happy to give CDT 3-4 years if he could demonstrate the ability to attract top talent like CBJ has done. Right now CDT has had 1 coveted recruit for about 48 hours then he went elsewhere. Coaching big time D1 athletics is a highly paid cut throat business and its not unreasonable for the fans to expect to see a foundation of success being laid for the program in the first 12 months. If CDT can't blow our socks off on the recruiting front in the next 3 months, it may be time to part ways if UT finds an out via this NCAA investigation business. UT doesn't owe CDT 3 years if he doesn't show concrete progress with the program.
Hart would be feeling the heat right now concerning CBJ if it weren't for the last 2 recruiting classes which have the fan base feeling optimistic for the future. I'll eat my words if proven wrong, but I don't see any way CDT can piece together a roster of mid level recruits and juco's and be consistently in the top 1/3rd of the SEC. He has to be able to recruit better players and he's never done that at any other of his coaching positions nor has he done it here to date. Ultimately, that's why the fan base lost confidence in CCM and he had 2 5* recruits mixed in with the rest. Maybe CBP spoiled us, but the expectation bar is pretty high when your getting $2 million plus a year.