Yup .... for good reasons. Unless you are on the floor no further back than the mixing desk, (the most expensive seats) the sound is notoriously poor. It wasn't built with the any consideration for acoustics. The proposed new arena will be.
In addition the whole place is tired and dated .... So many choose to avoid gigs there.
You should get in touch asap with Oak View to tell them to scrap their plans with immediate effect.All those months of feasibility studies and planning a £300m investment were pointless, cause the 'MEN is rarely sold out'.
Which is of course total bollocks. The current Arena is a 25 year old out of date sports venue unsuitable for gigs that is still the 10th biggest grossing Arena in the world !!!