While this is a largely negative post i do not wish it to be seen as an attack or gripe post but as a bug/issue report.
Firstly the good part... The actual visual design of the interface and how much it hassle it takes out of the game (i.e. having a large amount of game info available simply through mouseover rather than through multiple screens that need to be opened.) are great and i can't find any real fault in the visual way it changes the UI and in fact now do miss many of it's improvements but sadly i have found it game breaking as i will outline below.
Now the bad... I have found it to have a great affect on game performance to the extent i have had to remove it because it was crashing my game playing a huge, marathon game with 22 civs and 22 CS.
Playing that game (first time using this mod) around turn 650 i started getting game crashes with the error message "FGXRenderer11:

resent failed hr=DXGI_ERROR_DEVICE_REMOVED.Driver failure"
I was also getting some "application has stopped responding" game crashes.
That obviously seemed like a graphics card issue so i did all the usual of updating my drivers, played with it's setting to increase it's performance, turned down my in game graphics settings and tracked PC performance while playing the game, the last part showing that while the game was heavy use on my PC even at it's peak it was using less than 75% of any resource available to it and in fact usually crashing when under very little stress at all.
Testing found that predominantly this would happen when leader screens were popping up, usually when being contacted by an AI during the next turn phase. I found this out by saving at the end of each turn watching for when the game would crash then when i was able to get past that point see what was occurring and it was always a leader screen pop up.
Twice i also had it happen when clicking on the "enhanced scoreboard" to speak to a leader.
As i had no other real options with my hardware i started picking apart the game, verifying the game cache and turning off mods.
After turning off all mods i uninstalled this mod as it is a manually installed mod and have now played 10+ hours on full graphic settings with no issue at all.
On a final note the most immediate effect on uninstalling this mod was my game save load time dropped from 10+ minutes to 3 minutes 30s. I had been timing the load times as they had been getting increasingly severe and though it was abnormal as well as wanting to know how long it took so i could go do something else while it loaded not least because i was having to reload it every few turns due to the crashing.