Standard Win Rate + Question

[R18A1I4]

I know this isn't the biggest sample size, but after 9K hands I'm up 12.22 BB/100. This is playing 10NL on AP. My question is whether or not this is considered standard or should I be expecting something a little lower over the next 10K. I was actually at 15.5 BB/100 through the first 7K. And let's just assume I'm not a total donk.

My other question is just what kind of EV are hands like A2-A8 suited on the BTN with 4 limpers? Good enough to be in there just for flush cards?