Guild Wars 2

Will they go back and fix issues with their current systems and mechanics?

Such as the Z-Axis with its plethora of issues revolving around leaps, jumps, teleports, ground-target abilities, multiple sets of falling damage, etc…..here is hoping

HoT seems awfully vertical…this could be a red mark

They are planing on HoT being vertical.
Nothing is said about going back to “redo” things in the new fashion. Yet.

I do think they said in a live stream, that all profession specializations will have these new mechanics in effect. I’d like to see the entire system remastered but I wouldn’t count on seeing it before HoT is released, polished, and getting old to the players.