There is no particular virtue in trading by price action alone. Some people can do it; some people can't. Some people can trade intuitively; some people can't. But regardless of how one trades, the process of developing and testing a strategy doesn't change. Whether one uses S/R, patterns, Fib, Pivot Points, MA XOs, MACD divergences, ADX/DMI, CCI, etc etc etc, he still has to work it into a consistently profitable strategy.
The idea that indicators are "easier" because they require so much less judgement is seductive but misleading. If one uses MAs, for example, he has near-infinite choices regarding lengths and MA combinations, particularly if he incorporates simple, weighted, exponential, etc. And there are bar intervals to choose, timeframes, stops, triggers, targets, and so on. Copying somebody else's system doesn't work. If it did, everybody would be doing it and be happy.
And, yes, markets do change. You used to be able to set your watch by the 1230 reversal, but that's long gone. ORBs used to be a virtual ATM. Gaps used to be easier to play. But that's life.
The point, again, is not whether one trades by price action or by indicators or by planetary alignment. The point is that whatever one's choice might be, he has to be willing to translate all of that into a consistently profitable strategy. Wasp is clearly willing to do just that, no matter how long it takes.