I'm only looking at three of the four plots, as the bit swaps per tone isn't the bit loading per tone.
As usual, I start by looking at the two plots which tell about the physical infrastructure, the Hlog and QLN.
I see nothing that could be classed as a cause for concern in the Hlog plot. The is a "little bit of a wobble" within the US2 & DS3 bands and, exactly as
j0hn has commented, the characteristic "tail end droop" which is typically seen with a circuit connected to an ECI DSLAM.
The QLN plot, likewise, is good. There is very little "pick up" of licensed radio signals, which hints that the AC balance of the circuit is good -- common-mode rejection is working well. The characteristic inverted and reversed saw-tooth notch in the DS1 band is a give-away that there is significant DSPBO applied to all VDSL2 (ITU-T G.993.2) circuits connecting through the PCP. By that observation we can deduce that the length of the metallic-pathway, from the serving telephony exchange to the PCP, is long. Hence any ADSL2+ (ITU-T G.992.1|3|5) signal emanating from the telephony serving exchange is significantly attenuated at the point where the VDSL2 signal is injected into the local-loop. Thus the notch, to attenuate the VDSL2 signals to a power level equal to that of the ADSL2+ signals. There are a couple of very, very, slight "flying gulls" (as
Kitz would describe it) in the DS2 & US2 bands and a very weak undulation in the DS3 band. (I'll describe the latter as "one flap of an albatross' wing".) The above avian references are indicators of a small amount of cross-talk. Nothing significant and not any cause for concern.
Both the Hlog and the QLN plots are good. Not perfect but very acceptable. So, in summary, I see nothing of concern with regards to the metallic-pathway.
Finally the SNR per tone plot. Again we see a DSPBO notch in the DS1 band. Otherwise there is nothing much more that I can say . . .
To know the back-story of the circuit and the details of the replaced cable section might give an idea of where to make a more critical inspection but, with what information we have, the circuit is working well. Use it and enjoy it.
