I believe his BH now is more or less inline of what we want it to be. Maybe we can lower it 1% or so on power and consistency. He has TONS of other assets and it is important to build your game-play around them.
I share the sentiment that Federer has great backhand, but consider the facts: he rarely makes more then a handful winners from that side and generally will try to run over it every chance he gets, at time even if there is very little chance. He shanks tons of them and it is usually a "target" side for ALL of his opponents. That means he does get the ball from that side a lot, yet still, not making many winners and generally has hard time hitting down the line. Don't let that one "highlight" BH fool you, if you put it into a context of the whole match and calculate how many errors, weak BHs, slices, shanks he makes before that "one magical" BH, you can see his BH is quite average in a physical sense.
The way we had his BH before, you could score as many points with it as with FH, You didn't feel the pressure of needing to hit the FH, you could have just opted for hitting a BH even if you had plenty of time to run-over and hit FH.
Right now, you cannot do it as much (still can BTW, he still has a great BH), you would need to play the style of Roger to be successful - and that is MISSION ACCOMPLISHED as far as I am concerned.
Please understand, a lot of the "skill" in the Top 100 of ATP does not come from "ability". There is a difference in "ability" through the players, but it is minimal. Most of the difference is in the psychic of players, their chosen style of play and their approach. Physically the difference is minimal.
Lets take the Federer BH example: The reason it is "perceived" so good is not because the shot physically is so good, but rather because of how Federer uses, when he uses and with what intent. His eye and sense of timing is to me second to none in ATP, and overshadows his physical ability. So guess what? ..... the sense of timing and eyes should NOT be represented via stats, this should be YOUR ability to control him

Another note, I suggest you read up on how TE treats stroke stats. Combining all three stat categories is NOT the correct way to evaluate efficiency of the shot. The stats are dependent one on another. Also One Handed BH is more powerful by default in TE and has more reach by default, so comparing 1hBH to 2hBH is not really the right thing to do without taking it into account.
And yet another note

sorry. BHs will get weaker for most of the roster in the next update. Depending on the player of course, but we want our rallies to be structured a bit more, a mid or semi mid court ball should be hit with FHs, always, just like it is being done in pretty much all ATP matches.
Level 13 Edberg and counting...