RTR...IMO nothing in this sport is 'dumbing' The fact that RTR are available just makes the sport easier for new B's, they are well aware the capabilites of their vehicles, nobody spontaniously spends a few hundred dollars without doing some homework on the subject first, they have already decided on where or not racing is for them and how competitive an effort...
Brushless... I don't have a problem with this becoming the popular motor of choice, it may take the 'tunning' out of the motor, but it shifts emphasis onto the speed controls charactoristics, which a seasoned racer should be more adapt to taking advantage of then someone new to the sport, ya just have to put the dynos and lathes away and turn on the computer while ur surfing @ rc-tech. Learning a new way to tune your car never hurt anyone.
4cell TC... This is the same as talking about moving the winds of stock motors to 23 or 19 turns... Just look at a stock class now, its as fast as mod a few years back... Its just going to slow the class for a year or two before levels are back to normal, no new equipment needed, just a few rules/guidlines from ROAR.