I think in the context of tones in general, yeah it's a bit stuffy.
But as far as getting that End of Heartache-esque sound, I don't really see any issue with it. Whenever I hear the Rose of Sharyn re-amp, I tend to get into that mindset, that vibe of actually wanting to hear a kinda stuffy, saturated to shit tone, because I associate the song and the album to that sound, ya know?
If a band walked in and said "I want that sound with the guitars", I think this setup can get into that territory.
No, it's not perfect from a technical standpoint, but if a band walks away happy with the result and, why not? A lot of people really dig that End of Heartache guitar sound.
It's a tone that's good enough to get you into the ballpark of at least a good sounding production.
I think if a guy like Ola can come in and say "Yeah, that sounds good!", it would have to be on the right track, since an opinion like Ola's on guitar sounds holds a good amount of weight as we know by now.
So I wouldn't abandon that setup. It's another tool in the box to use if someone wants that sound and as I said, I think that upper mid range character is pretty solid, regardless of whether it's stuffy in the lower mids or not.
And then for other projects, you can definitely go for a less stuffy sound that allow some superior separation in the lower mids.
Bit of a ramble there, but just a thought.