If they want Stage 2s to make a comeback, they need to make Stage 2s comparable to EX's. Not necessarily Megas, but basic EX's anyway. You're having to invest deck space on at least a 3 to 1 ratio by using Stage 2, so the least they could do is make the stats comparable to EX's.
At THAT point, along with help from things like Wally and Giant Plant Forest will Stage 2s become viable again
At THAT point, along with help from things like Wally and Giant Plant Forest will Stage 2s become viable again