Not only do they READ this forum, they correlate all the comments and take them to regular internal meetings. I know it doesn't feel like it sometimes, but they really ARE trying to improve the product and I am pretty sure that here is one of their prime places for finding out what is most urgent. Adcentre411 is on holiday at the moment but I am sure will be back in the not too distant.
Their biggest problem is scale. Microsoft being Microsoft, adding a full stop to a page is hard enough, leave alone simplifying the navigation! They are tring to prioritise all the different demannds on their programmers and as far as I can see, stuff that affects the READERS of the adverts (like conversion tracking breaking the page in Firefox) gets fixed before the stuff that affects the webmasters (like Adcenter's control panels having issues in Firefox).
Anyway. I can assure you they ARE reading this. I can't assure you that they know how to fix everything!