You wouldn't think it'd be that hard to lay a path down for the pax to follow; just like you need to for embedded plane stairs.
The path it's extremely easy to do: all our passengers already walks on path. But a path to a terminal can work only if it's precisely customized for each gate.
We tried the solution of making a "generic" path, and experimented with it at PHKO, were all gates are of the walk to terminal type. And, of course, it was a big, huge mess which looked buggy, it was simply not possible to find a generic path that would work everywhere: it MUST be done right, with an editor that will allow to place paths for each parking.
So, the difficult part is the editor and, since we'll need some kind of path editor anyway for the next GSX update which will allow fully customized pushback procedures, we decided to wait for this feature, and release it later on, when we'll have our path editor.