A huge step in the wrong direction. The on the run communications have the potential for zero time impact.
For the awarding of tries, what was done in Super Rugby (and Mitre 10 cup) has been brilliant this year. The referee makes the decision he would make if there were no TMO - "Try or No Try" and if he has doubts he calls in the TMO. If the TMO finds clear and obvious evidence that the referee is wrong, he overturns the decision; if not, then the on-field decision stands. Its the system with the least amount of confusion (both the NFL and NRL use this system; they are both a long way ahead of us in the use of video technology).
It seems some of the old guard of WR are still invested in the quaint old idea that one man is the "sole judge of fact". That is a time and a philosophy that went out with the advent of professional Rugby Union. It may still apply at the amateur level, but there is simply no place for it at the top end of the game. There is now a team of four match officials, lets use them to the best and most efficient advantage.
If it was my place to say what happens, this is what I would do:
1. Keep the on the run chat
2. Keep the TMO calling in foul play just like the ARs do. We want to increase the chances of catching dirty players, not increase their chances of getting away with it.
3. Keep the "Try-No try" call we have now in SR
4. Dispense with having the on field referee watching the big screen and "helping" the TMO to make a decision. Once the Referee hands the job off to the TMO it becomes HIS decision, and that decision is final (a la the NRL)