It's great that custom ad locations can be added to the code by each user (as everyone as different needs). However, most of those who use/buy mods, do it because they don't know how to code. So simple things like you (SMFHacks) describe can seem insanely hard to do for non-coders.
What I would look for AdSeller Pro new developments was a better organized section (ex: Main Board, Posts, Actions, etc) of where ads could be put and more default locations (for example a section "Posts" with the options of 2, 4, 6, 8 position) as well more default locations for the SMFHacks Mods (Gallery, Classifieds, Store, etc). Plus, customized locations on templates become a nightmare for updates as they will be most likely erased in the process.