The biggest problem i see is that given how tight you are your W$WSF is really really low (and ties in with what Robb said about your W$SD). Are you limping/calling with a lot of SCs/PPs then playing fit or fold postflop?

What are you limping from EP btw? Is it just small PPs? Whatever it is, i'd cut it out. Raise or fold. You could probably stand to defend your BB a little more as well, i imagine your fold BB to steal must be like 90%? Anyone paying attention will be raising the button when you are the BB with practically anything so u can profitably 3bet a little more. Oh and open up more from LP u nit