Have you actually tried the smaller wick holes and found them deficient, or are you just wondering about the change? Because, they may be perfectly fine and vape very similarly (and I suppose it's possible there was some other change).
Sorry, I don't have the answer to your question the 0.7 was my least favorite of the coils, but I do think Aspire has made other changes to the coil over the years, it might wind up being good is all I'm saying.
Anna