Yeah I agree @woollydog. It is the wrong benchmark, and they...

Yeah I agree @woollydog. It is the wrong benchmark, and they should change it. However the other half of me doesn't care. No one looks at the fees as long as the fund continues to out-perform. It's the same in the Financial Planning world, Legal world, etc. You get what you pay for.
IMO the net return outcome is all that matters. Different story of course if this fund starts to under-perform against their mid / small cap peers over say 1-2 years. Then I would have to review why, and make a decision to hold, buy more or sell.