if you want more of that 2.05 high end, use one of the 'ideal' power amp tube types.
if it's still too dark change the input 1 impedance from auto to 1M or 1M+Cap. there's still high end available, these tubes just got...aged.
. Also lower the power tube grid bias, that adds a little more top.
if it's still too dark lower cathode follower harmonics, that adds a little bit of top too.
if it's still too dark lower speaker compression, that lets more top through as well.
A little bit of cab preamp treble adds a bit of top end.
A little more on the treble knob, a little more on the presence knob. A little less master volume.
The IR you were using is the same as when it sounded good, don't change that. It was cutting well like a Boss GT-6 to board cuts well...now it's breaking up like an amp with accurate top end and not cutting as well. Just need to probably lower the gain, lower the master, turn up the treble. High end is still available, it's just a little warmer.