Did you make your level template persistent?
I am pretty sure that event triggers placed in a level template level were still working correctly for me in the 'parent' level that used it as a template. I will do some testing again with that to verify though.
I am however debugging what I think is a related problem with Camera Spectator Triggers. If I try to switch the player's camera view to a spectator camera that is located in a level template, it only works when the player is physically located in that level but not in levels that make use of it as a template.
It may be that they intended level templates to primarily be used for editing and shaping non-interactive terrain though, which as you said would be a bit of a bummer.
