The thing is that Solardwinds is a suite of products specifically aimed at certain things as Spectrum is with others. Sometimes vendors focus on different things. Solarwinds will not do everything Spectrum does and vice versa. Solar winds falls short of lots of things too. There is no 1 product to rule them all. You have to use a collection of tools in most cases, as expecting Spectrum to do everything is expecting too much. We try use CA tools wherever possible as they integrate well most of the times, but we still end up using other tools as well as CA can't be the best of everything all the time. They choose some areas and are very good at it in some cases - and other times not-so-good-but-getting-better. Spectrum is very good at many things but yes, wifi management isn't that great when compared to Cisco Prime but then it now has basic Wireless management - which is a good thing better than what was available before.
I disagree that it is a basic feature - There is a lot of info it needs from controllers and it also needs to do triangulation between AP's and you also need to have some sort of editor which works out the floorpan etc. it's not basic. In order to do a proper heat-map you even need to do a site survey and collect accurate data.