Although not living in Edmonton anymore I did live there for many a year .... during my time there I've been to WEM countless times but, perhaps due to its shear size my family and I rarely bought anything there as we'd be 'pooped' from walking around far before we got to the stores we 'really' wanted to visit. We far preferred doing our shopping @ Southgate and Kingsway ... and, occasionally, Londonderry and Edmonton Centre.
The interior of WEM despirately needs a major overhaul to keep attracting tourists and locals alike ... again, Southgate, Londonderry and Kingsway have all undergone major renovations over the years and I far prefer the interior architecture of anyone of those malls to WEM. As for WEM's exterior ... bland and frankly due to all the parking you really can't see the mall from the exterior save the hotel and a few other features which rise above the parkade from ...
As for WEM shaping Edmonton's growth ... I'd have to say definately yes in terms of the 'new Westend' (eg. from 170 Street west to the city limits and from Anthony Henday north to Stony Plain Road) ... to me the biggest effect which WEM has had on westend has been in terms of the traffic infrastructure ... eg. 170 Street is wider than a lot of freeways I know of and I'm pretty sure that if WEM didn't exist that a large part of the Anthony Henday bypass wouldn't have been built for years